./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 991fb09b573d5827d0db553f1ea89a581f5a664ba8b68d6f14a043df738f2f6d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:23:34,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:23:34,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:23:34,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:23:34,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:23:34,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:23:34,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:23:34,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:23:34,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:23:34,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:23:34,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:23:34,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:23:34,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:23:34,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:23:34,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:23:34,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:23:34,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:23:34,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:23:34,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:23:34,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:23:34,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:23:34,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:23:34,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:23:34,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:23:34,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:23:34,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:23:34,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:23:34,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:23:34,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:23:34,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:23:34,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:23:34,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:23:34,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:23:34,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:23:34,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:23:34,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:23:34,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:23:34,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:23:34,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:23:34,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:23:34,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:23:34,916 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 22:23:34,933 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:23:34,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:23:34,933 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:23:34,933 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:23:34,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:23:34,934 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:23:34,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:23:34,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:23:34,934 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:23:34,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:23:34,935 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:23:34,935 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 22:23:34,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:23:34,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:23:34,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:23:34,935 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 22:23:34,935 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 22:23:34,935 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 22:23:34,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:23:34,936 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 22:23:34,936 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:23:34,936 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:23:34,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:23:34,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:23:34,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:23:34,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:23:34,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:23:34,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:23:34,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:23:34,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:23:34,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:23:34,937 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_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 991fb09b573d5827d0db553f1ea89a581f5a664ba8b68d6f14a043df738f2f6d [2021-12-06 22:23:35,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:23:35,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:23:35,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:23:35,142 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:23:35,143 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:23:35,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2021-12-06 22:23:35,191 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/data/3d2d7b31f/4436320323a447898c5af6652920f221/FLAG6d4be1963 [2021-12-06 22:23:35,610 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:23:35,610 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2021-12-06 22:23:35,621 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/data/3d2d7b31f/4436320323a447898c5af6652920f221/FLAG6d4be1963 [2021-12-06 22:23:35,631 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/data/3d2d7b31f/4436320323a447898c5af6652920f221 [2021-12-06 22:23:35,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:23:35,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:23:35,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:23:35,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:23:35,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:23:35,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:23:35" (1/1) ... [2021-12-06 22:23:35,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49c7ee1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:35, skipping insertion in model container [2021-12-06 22:23:35,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:23:35" (1/1) ... [2021-12-06 22:23:35,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:23:35,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:23:35,889 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:23:35,897 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:23:35,935 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:23:35,962 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:23:35,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:35 WrapperNode [2021-12-06 22:23:35,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:23:35,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:23:35,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:23:35,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:23:35,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:35" (1/1) ... [2021-12-06 22:23:35,985 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:35" (1/1) ... [2021-12-06 22:23:36,010 INFO L137 Inliner]: procedures = 119, calls = 23, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 160 [2021-12-06 22:23:36,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:23:36,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:23:36,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:23:36,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:23:36,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:35" (1/1) ... [2021-12-06 22:23:36,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:35" (1/1) ... [2021-12-06 22:23:36,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:35" (1/1) ... [2021-12-06 22:23:36,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:35" (1/1) ... [2021-12-06 22:23:36,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:35" (1/1) ... [2021-12-06 22:23:36,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:35" (1/1) ... [2021-12-06 22:23:36,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:35" (1/1) ... [2021-12-06 22:23:36,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:23:36,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:23:36,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:23:36,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:23:36,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:35" (1/1) ... [2021-12-06 22:23:36,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:23:36,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:36,068 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:23:36,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:23:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 22:23:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 22:23:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 22:23:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 22:23:36,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:23:36,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:23:36,175 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:23:36,176 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:23:36,389 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:23:36,396 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:23:36,396 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-06 22:23:36,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:23:36 BoogieIcfgContainer [2021-12-06 22:23:36,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:23:36,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:23:36,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:23:36,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:23:36,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:23:35" (1/3) ... [2021-12-06 22:23:36,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1188b977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:23:36, skipping insertion in model container [2021-12-06 22:23:36,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:23:35" (2/3) ... [2021-12-06 22:23:36,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1188b977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:23:36, skipping insertion in model container [2021-12-06 22:23:36,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:23:36" (3/3) ... [2021-12-06 22:23:36,406 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrstr-alloca-2.i [2021-12-06 22:23:36,412 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:23:36,412 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-12-06 22:23:36,446 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:23:36,452 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 22:23:36,452 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-12-06 22:23:36,463 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 53 states have (on average 1.830188679245283) internal successors, (97), 78 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:36,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 22:23:36,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:36,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:36,468 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:36,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-06 22:23:36,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:36,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541886045] [2021-12-06 22:23:36,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:36,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:23:36,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:36,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541886045] [2021-12-06 22:23:36,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541886045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:36,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:36,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:23:36,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704445246] [2021-12-06 22:23:36,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:36,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:23:36,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:36,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:23:36,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:23:36,657 INFO L87 Difference]: Start difference. First operand has 79 states, 53 states have (on average 1.830188679245283) internal successors, (97), 78 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:36,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:36,718 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2021-12-06 22:23:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:23:36,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 22:23:36,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:36,726 INFO L225 Difference]: With dead ends: 77 [2021-12-06 22:23:36,726 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 22:23:36,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:23:36,730 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 77 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:36,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 68 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:36,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 22:23:36,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-12-06 22:23:36,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 74 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2021-12-06 22:23:36,760 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 7 [2021-12-06 22:23:36,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:36,760 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2021-12-06 22:23:36,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:36,761 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2021-12-06 22:23:36,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 22:23:36,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:36,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:36,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:23:36,762 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:36,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:36,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2021-12-06 22:23:36,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:36,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162711005] [2021-12-06 22:23:36,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:36,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:23:36,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:36,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162711005] [2021-12-06 22:23:36,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162711005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:36,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:36,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:23:36,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095299382] [2021-12-06 22:23:36,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:36,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:23:36,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:36,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:23:36,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:23:36,855 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:36,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:36,919 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2021-12-06 22:23:36,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:23:36,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 22:23:36,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:36,921 INFO L225 Difference]: With dead ends: 79 [2021-12-06 22:23:36,921 INFO L226 Difference]: Without dead ends: 79 [2021-12-06 22:23:36,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:23:36,923 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 87 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:36,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 133 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:36,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-06 22:23:36,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2021-12-06 22:23:36,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 76 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2021-12-06 22:23:36,934 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 7 [2021-12-06 22:23:36,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:36,934 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2021-12-06 22:23:36,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:36,935 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2021-12-06 22:23:36,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 22:23:36,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:36,935 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:36,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:23:36,936 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:36,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:36,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2021-12-06 22:23:36,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:36,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566963778] [2021-12-06 22:23:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:36,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:23:36,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:36,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566963778] [2021-12-06 22:23:36,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566963778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:36,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854318196] [2021-12-06 22:23:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:36,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:36,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:36,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:36,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:23:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:37,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 22:23:37,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:23:37,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:23:37,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854318196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:37,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:23:37,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-06 22:23:37,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247201432] [2021-12-06 22:23:37,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:37,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:23:37,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:37,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:23:37,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:23:37,120 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:37,153 INFO L93 Difference]: Finished difference Result 149 states and 171 transitions. [2021-12-06 22:23:37,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:23:37,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 22:23:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:37,155 INFO L225 Difference]: With dead ends: 149 [2021-12-06 22:23:37,155 INFO L226 Difference]: Without dead ends: 149 [2021-12-06 22:23:37,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:23:37,156 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 80 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:37,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 311 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-06 22:23:37,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 84. [2021-12-06 22:23:37,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.5901639344262295) internal successors, (97), 83 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:37,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2021-12-06 22:23:37,164 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 11 [2021-12-06 22:23:37,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:37,164 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2021-12-06 22:23:37,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2021-12-06 22:23:37,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 22:23:37,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:37,165 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:37,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:23:37,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:37,367 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:37,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-06 22:23:37,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:37,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124051419] [2021-12-06 22:23:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:37,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:23:37,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:37,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124051419] [2021-12-06 22:23:37,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124051419] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:37,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529689276] [2021-12-06 22:23:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:37,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:37,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:37,549 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:37,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:23:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:37,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 22:23:37,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:37,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:23:37,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:23:37,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:23:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:23:37,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:23:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:23:37,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529689276] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:23:37,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:23:37,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-06 22:23:37,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013614997] [2021-12-06 22:23:37,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:23:37,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 22:23:37,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:37,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 22:23:37,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:23:37,845 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:37,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:37,930 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2021-12-06 22:23:37,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:23:37,931 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 22:23:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:37,932 INFO L225 Difference]: With dead ends: 85 [2021-12-06 22:23:37,932 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 22:23:37,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:23:37,934 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 85 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:37,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 182 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:23:37,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 22:23:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-12-06 22:23:37,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 81 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2021-12-06 22:23:37,943 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 11 [2021-12-06 22:23:37,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:37,943 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2021-12-06 22:23:37,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:37,943 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2021-12-06 22:23:37,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 22:23:37,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:37,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:37,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:23:38,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:38,145 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265437, now seen corresponding path program 1 times [2021-12-06 22:23:38,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:38,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099738447] [2021-12-06 22:23:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:38,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:38,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:38,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099738447] [2021-12-06 22:23:38,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099738447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:38,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:38,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:23:38,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988151828] [2021-12-06 22:23:38,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:38,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:23:38,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:38,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:23:38,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:23:38,215 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:38,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:38,253 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2021-12-06 22:23:38,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:23:38,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 22:23:38,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:38,255 INFO L225 Difference]: With dead ends: 88 [2021-12-06 22:23:38,255 INFO L226 Difference]: Without dead ends: 88 [2021-12-06 22:23:38,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:23:38,256 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 79 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:38,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 155 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-06 22:23:38,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2021-12-06 22:23:38,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:38,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2021-12-06 22:23:38,266 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 13 [2021-12-06 22:23:38,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:38,266 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2021-12-06 22:23:38,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:38,266 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2021-12-06 22:23:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 22:23:38,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:38,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:38,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 22:23:38,268 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:38,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265385, now seen corresponding path program 1 times [2021-12-06 22:23:38,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:38,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41187195] [2021-12-06 22:23:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:38,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:38,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:38,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41187195] [2021-12-06 22:23:38,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41187195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:38,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:38,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:23:38,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848827967] [2021-12-06 22:23:38,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:38,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:23:38,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:38,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:23:38,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:23:38,306 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:38,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:38,363 INFO L93 Difference]: Finished difference Result 145 states and 167 transitions. [2021-12-06 22:23:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:23:38,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 22:23:38,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:38,365 INFO L225 Difference]: With dead ends: 145 [2021-12-06 22:23:38,365 INFO L226 Difference]: Without dead ends: 145 [2021-12-06 22:23:38,365 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 [2021-12-06 22:23:38,366 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 155 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:38,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 164 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:23:38,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-06 22:23:38,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 81. [2021-12-06 22:23:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.540983606557377) internal successors, (94), 80 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:38,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2021-12-06 22:23:38,372 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 13 [2021-12-06 22:23:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:38,372 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2021-12-06 22:23:38,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2021-12-06 22:23:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 22:23:38,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:38,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:38,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:23:38,373 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:38,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265384, now seen corresponding path program 1 times [2021-12-06 22:23:38,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:38,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136841145] [2021-12-06 22:23:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:38,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:38,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:38,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136841145] [2021-12-06 22:23:38,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136841145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:38,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:38,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:23:38,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887478848] [2021-12-06 22:23:38,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:38,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:23:38,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:38,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:23:38,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:23:38,423 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:38,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:38,467 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-12-06 22:23:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:23:38,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 22:23:38,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:38,468 INFO L225 Difference]: With dead ends: 83 [2021-12-06 22:23:38,468 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 22:23:38,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:23:38,469 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 151 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:38,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 165 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:38,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 22:23:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2021-12-06 22:23:38,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 80 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2021-12-06 22:23:38,474 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 13 [2021-12-06 22:23:38,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:38,474 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2021-12-06 22:23:38,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:38,474 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2021-12-06 22:23:38,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 22:23:38,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:38,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:38,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 22:23:38,475 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:38,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:38,475 INFO L85 PathProgramCache]: Analyzing trace with hash -862198810, now seen corresponding path program 1 times [2021-12-06 22:23:38,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:38,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267282294] [2021-12-06 22:23:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:38,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:38,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:38,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267282294] [2021-12-06 22:23:38,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267282294] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:38,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599863057] [2021-12-06 22:23:38,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:38,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:38,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:38,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:38,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:23:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:38,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 22:23:38,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:38,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:23:38,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 18 [2021-12-06 22:23:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:38,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599863057] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:23:38,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:23:38,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-06 22:23:38,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899075718] [2021-12-06 22:23:38,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:23:38,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 22:23:38,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:38,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 22:23:38,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:23:38,785 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:38,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:38,904 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2021-12-06 22:23:38,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:23:38,904 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 22:23:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:38,905 INFO L225 Difference]: With dead ends: 144 [2021-12-06 22:23:38,905 INFO L226 Difference]: Without dead ends: 144 [2021-12-06 22:23:38,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:23:38,906 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 353 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:38,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 385 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:23:38,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-06 22:23:38,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 89. [2021-12-06 22:23:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 88 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2021-12-06 22:23:38,910 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 17 [2021-12-06 22:23:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:38,911 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2021-12-06 22:23:38,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2021-12-06 22:23:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 22:23:38,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:38,911 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:38,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:23:39,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:39,113 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:39,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:39,114 INFO L85 PathProgramCache]: Analyzing trace with hash -862198757, now seen corresponding path program 1 times [2021-12-06 22:23:39,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:39,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700332183] [2021-12-06 22:23:39,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:39,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:39,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:39,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700332183] [2021-12-06 22:23:39,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700332183] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:39,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129045169] [2021-12-06 22:23:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:39,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:39,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:39,242 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:39,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:23:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:39,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 22:23:39,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:39,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:23:39,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129045169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:39,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:23:39,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-06 22:23:39,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527994756] [2021-12-06 22:23:39,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:39,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:23:39,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:39,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:23:39,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:23:39,355 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:39,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:39,369 INFO L93 Difference]: Finished difference Result 170 states and 194 transitions. [2021-12-06 22:23:39,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:23:39,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 22:23:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:39,370 INFO L225 Difference]: With dead ends: 170 [2021-12-06 22:23:39,370 INFO L226 Difference]: Without dead ends: 170 [2021-12-06 22:23:39,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:23:39,371 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 69 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:39,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 230 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:39,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-06 22:23:39,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 113. [2021-12-06 22:23:39,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 94 states have (on average 1.372340425531915) internal successors, (129), 112 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:39,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2021-12-06 22:23:39,375 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 17 [2021-12-06 22:23:39,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:39,375 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2021-12-06 22:23:39,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:39,375 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2021-12-06 22:23:39,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 22:23:39,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:39,376 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:39,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:23:39,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:39,577 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:39,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:39,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1873316007, now seen corresponding path program 1 times [2021-12-06 22:23:39,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:39,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393417459] [2021-12-06 22:23:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:39,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:39,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:39,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393417459] [2021-12-06 22:23:39,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393417459] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:39,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852544805] [2021-12-06 22:23:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:39,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:39,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:39,717 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:39,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:23:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:39,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 22:23:39,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:39,774 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:23:39,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:23:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:39,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:23:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:39,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852544805] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:23:39,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:23:39,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-06 22:23:39,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086194871] [2021-12-06 22:23:39,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:23:39,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 22:23:39,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:39,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 22:23:39,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:23:39,970 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 13 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) [2021-12-06 22:23:40,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:40,039 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2021-12-06 22:23:40,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:23:40,039 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 13 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) Word has length 17 [2021-12-06 22:23:40,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:40,040 INFO L225 Difference]: With dead ends: 116 [2021-12-06 22:23:40,040 INFO L226 Difference]: Without dead ends: 116 [2021-12-06 22:23:40,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-06 22:23:40,041 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 292 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:40,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 172 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:40,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-06 22:23:40,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2021-12-06 22:23:40,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 92 states have (on average 1.358695652173913) internal successors, (125), 109 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:40,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2021-12-06 22:23:40,045 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 17 [2021-12-06 22:23:40,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:40,045 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2021-12-06 22:23:40,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 13 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) [2021-12-06 22:23:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2021-12-06 22:23:40,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 22:23:40,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:40,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:40,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:23:40,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 22:23:40,247 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:40,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:40,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2142062488, now seen corresponding path program 1 times [2021-12-06 22:23:40,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:40,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201977970] [2021-12-06 22:23:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:40,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:40,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:40,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201977970] [2021-12-06 22:23:40,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201977970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:40,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:40,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:23:40,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606221293] [2021-12-06 22:23:40,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:40,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:23:40,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:40,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:23:40,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:23:40,432 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:40,481 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2021-12-06 22:23:40,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:23:40,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 22:23:40,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:40,482 INFO L225 Difference]: With dead ends: 109 [2021-12-06 22:23:40,482 INFO L226 Difference]: Without dead ends: 109 [2021-12-06 22:23:40,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:23:40,483 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 155 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:40,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 114 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:40,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-06 22:23:40,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2021-12-06 22:23:40,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 79 states have (on average 1.3924050632911393) internal successors, (110), 95 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:40,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2021-12-06 22:23:40,486 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 17 [2021-12-06 22:23:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:40,487 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2021-12-06 22:23:40,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2021-12-06 22:23:40,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 22:23:40,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:40,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:40,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 22:23:40,488 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:40,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:40,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1860324492, now seen corresponding path program 1 times [2021-12-06 22:23:40,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:40,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438924921] [2021-12-06 22:23:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:40,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:40,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:40,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438924921] [2021-12-06 22:23:40,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438924921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:40,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:40,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:23:40,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86604869] [2021-12-06 22:23:40,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:40,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:23:40,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:40,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:23:40,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:23:40,517 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:40,546 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2021-12-06 22:23:40,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:23:40,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 22:23:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:40,547 INFO L225 Difference]: With dead ends: 95 [2021-12-06 22:23:40,547 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 22:23:40,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:23:40,548 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 68 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:40,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 113 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:40,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 22:23:40,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-06 22:23:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 79 states have (on average 1.379746835443038) internal successors, (109), 94 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:40,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2021-12-06 22:23:40,551 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 20 [2021-12-06 22:23:40,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:40,551 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2021-12-06 22:23:40,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:40,551 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2021-12-06 22:23:40,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 22:23:40,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:40,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:40,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 22:23:40,552 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:40,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:40,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1860324491, now seen corresponding path program 1 times [2021-12-06 22:23:40,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:40,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822189802] [2021-12-06 22:23:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:40,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:23:40,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:40,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822189802] [2021-12-06 22:23:40,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822189802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:40,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:40,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:23:40,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623694163] [2021-12-06 22:23:40,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:40,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:23:40,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:40,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:23:40,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:23:40,606 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:40,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:40,641 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-12-06 22:23:40,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:23:40,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 22:23:40,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:40,642 INFO L225 Difference]: With dead ends: 94 [2021-12-06 22:23:40,642 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 22:23:40,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:23:40,643 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 146 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:40,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 117 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 22:23:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-06 22:23:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 79 states have (on average 1.3670886075949367) internal successors, (108), 93 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-12-06 22:23:40,646 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 20 [2021-12-06 22:23:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:40,647 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-12-06 22:23:40,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-12-06 22:23:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 22:23:40,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:40,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:40,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 22:23:40,648 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:40,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:40,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1331077295, now seen corresponding path program 1 times [2021-12-06 22:23:40,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:40,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129492046] [2021-12-06 22:23:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:40,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:40,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:40,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129492046] [2021-12-06 22:23:40,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129492046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:40,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:40,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:23:40,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539294589] [2021-12-06 22:23:40,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:40,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:23:40,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:40,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:23:40,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:23:40,683 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:40,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:40,716 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2021-12-06 22:23:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:23:40,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 22:23:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:40,718 INFO L225 Difference]: With dead ends: 95 [2021-12-06 22:23:40,718 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 22:23:40,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:23:40,719 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 164 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:40,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 88 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 22:23:40,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-12-06 22:23:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 79 states have (on average 1.3544303797468353) internal successors, (107), 92 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:40,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2021-12-06 22:23:40,722 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 23 [2021-12-06 22:23:40,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:40,722 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2021-12-06 22:23:40,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:40,723 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2021-12-06 22:23:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 22:23:40,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:40,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:40,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 22:23:40,723 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:40,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:40,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1331077296, now seen corresponding path program 1 times [2021-12-06 22:23:40,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:40,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117827704] [2021-12-06 22:23:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:40,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:40,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:40,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117827704] [2021-12-06 22:23:40,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117827704] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:40,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840599898] [2021-12-06 22:23:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:40,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:40,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:40,825 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:40,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:23:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:40,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 22:23:40,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:40,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:23:40,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:23:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:23:40,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:23:40,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840599898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:40,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:23:40,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 13 [2021-12-06 22:23:40,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276739490] [2021-12-06 22:23:40,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:40,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:23:40,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:40,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:23:40,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:23:40,944 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:41,012 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2021-12-06 22:23:41,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 22:23:41,013 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 22:23:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:41,013 INFO L225 Difference]: With dead ends: 107 [2021-12-06 22:23:41,013 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 22:23:41,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:23:41,014 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 35 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:41,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 464 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 22:23:41,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2021-12-06 22:23:41,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 85 states have (on average 1.3294117647058823) internal successors, (113), 98 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:41,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2021-12-06 22:23:41,017 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 23 [2021-12-06 22:23:41,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:41,017 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2021-12-06 22:23:41,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2021-12-06 22:23:41,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 22:23:41,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:41,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:41,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:23:41,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 22:23:41,218 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:41,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:41,219 INFO L85 PathProgramCache]: Analyzing trace with hash 513428846, now seen corresponding path program 1 times [2021-12-06 22:23:41,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:41,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849189701] [2021-12-06 22:23:41,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:41,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:41,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849189701] [2021-12-06 22:23:41,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849189701] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881350654] [2021-12-06 22:23:41,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:41,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:41,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:41,352 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:41,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:23:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:41,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 22:23:41,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:41,412 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:23:41,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:23:41,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:23:41,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:23:41,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-06 22:23:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:41,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:23:41,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-06 22:23:41,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 22:23:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:41,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881350654] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:23:41,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:23:41,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2021-12-06 22:23:41,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647082845] [2021-12-06 22:23:41,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:23:41,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 22:23:41,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:41,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 22:23:41,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:23:41,841 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:42,086 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2021-12-06 22:23:42,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:23:42,086 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 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) Word has length 23 [2021-12-06 22:23:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:42,087 INFO L225 Difference]: With dead ends: 116 [2021-12-06 22:23:42,087 INFO L226 Difference]: Without dead ends: 116 [2021-12-06 22:23:42,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2021-12-06 22:23:42,088 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 77 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:42,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 775 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 207 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2021-12-06 22:23:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-06 22:23:42,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 103. [2021-12-06 22:23:42,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 102 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:42,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2021-12-06 22:23:42,090 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 23 [2021-12-06 22:23:42,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:42,091 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2021-12-06 22:23:42,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:42,091 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2021-12-06 22:23:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 22:23:42,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:42,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:42,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 22:23:42,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 22:23:42,292 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:42,293 INFO L85 PathProgramCache]: Analyzing trace with hash -731742098, now seen corresponding path program 1 times [2021-12-06 22:23:42,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:42,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583062963] [2021-12-06 22:23:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:42,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:23:42,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:42,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583062963] [2021-12-06 22:23:42,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583062963] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:42,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:42,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:23:42,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535085073] [2021-12-06 22:23:42,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:42,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:23:42,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:42,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:23:42,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:23:42,334 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:42,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:42,357 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2021-12-06 22:23:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:23:42,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 22:23:42,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:42,358 INFO L225 Difference]: With dead ends: 102 [2021-12-06 22:23:42,358 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 22:23:42,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:23:42,359 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 53 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:42,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:42,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 22:23:42,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-06 22:23:42,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 61 states have (on average 1.360655737704918) internal successors, (83), 73 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:42,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-12-06 22:23:42,361 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 25 [2021-12-06 22:23:42,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:42,361 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-12-06 22:23:42,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:42,362 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-12-06 22:23:42,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 22:23:42,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:42,362 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:42,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 22:23:42,362 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:42,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:42,362 INFO L85 PathProgramCache]: Analyzing trace with hash 510694897, now seen corresponding path program 2 times [2021-12-06 22:23:42,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:42,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236392140] [2021-12-06 22:23:42,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:42,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:42,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:42,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236392140] [2021-12-06 22:23:42,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236392140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:42,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985575077] [2021-12-06 22:23:42,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:23:42,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:42,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:42,445 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:42,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 22:23:42,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 22:23:42,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:23:42,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 22:23:42,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:42,514 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:23:42,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:23:42,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:23:42,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:23:42,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 22:23:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 22:23:42,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:23:42,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985575077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:42,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:23:42,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 16 [2021-12-06 22:23:42,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101202584] [2021-12-06 22:23:42,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:42,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 22:23:42,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:42,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 22:23:42,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:23:42,766 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:42,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:42,906 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2021-12-06 22:23:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:23:42,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 22:23:42,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:42,907 INFO L225 Difference]: With dead ends: 114 [2021-12-06 22:23:42,907 INFO L226 Difference]: Without dead ends: 114 [2021-12-06 22:23:42,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:23:42,908 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 244 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:42,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 249 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 90 Unchecked, 0.1s Time] [2021-12-06 22:23:42,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-06 22:23:42,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2021-12-06 22:23:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:42,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-12-06 22:23:42,911 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 27 [2021-12-06 22:23:42,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:42,911 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-12-06 22:23:42,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:42,911 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-12-06 22:23:42,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 22:23:42,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:42,912 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:42,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 22:23:43,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 22:23:43,114 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:43,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:43,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1337529045, now seen corresponding path program 1 times [2021-12-06 22:23:43,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:43,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261454948] [2021-12-06 22:23:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:43,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:43,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:43,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261454948] [2021-12-06 22:23:43,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261454948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:43,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173408856] [2021-12-06 22:23:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:43,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:43,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:43,310 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:43,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 22:23:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:43,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 22:23:43,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:43,368 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:23:43,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:23:43,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:23:43,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:23:43,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-06 22:23:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:43,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:23:43,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-06 22:23:43,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 22:23:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:43,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173408856] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:23:43,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:23:43,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2021-12-06 22:23:43,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877683321] [2021-12-06 22:23:43,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:23:43,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 22:23:43,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:43,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 22:23:43,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-12-06 22:23:43,954 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:44,299 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2021-12-06 22:23:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:23:44,299 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 22:23:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:44,300 INFO L225 Difference]: With dead ends: 90 [2021-12-06 22:23:44,300 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 22:23:44,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 22:23:44,301 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 86 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:44,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 916 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 268 Invalid, 0 Unknown, 161 Unchecked, 0.1s Time] [2021-12-06 22:23:44,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 22:23:44,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2021-12-06 22:23:44,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 86 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:44,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2021-12-06 22:23:44,304 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 30 [2021-12-06 22:23:44,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:44,304 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2021-12-06 22:23:44,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:44,304 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2021-12-06 22:23:44,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 22:23:44,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:44,304 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:44,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 22:23:44,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:44,506 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:44,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:44,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1863084157, now seen corresponding path program 1 times [2021-12-06 22:23:44,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:44,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716125828] [2021-12-06 22:23:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:44,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:44,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:44,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716125828] [2021-12-06 22:23:44,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716125828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:44,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:44,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:23:44,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100736386] [2021-12-06 22:23:44,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:44,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:23:44,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:44,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:23:44,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:23:44,560 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:44,593 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-12-06 22:23:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:23:44,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-06 22:23:44,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:44,594 INFO L225 Difference]: With dead ends: 86 [2021-12-06 22:23:44,594 INFO L226 Difference]: Without dead ends: 86 [2021-12-06 22:23:44,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:23:44,595 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 93 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:44,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 106 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:44,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-06 22:23:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-06 22:23:44,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.2972972972972974) internal successors, (96), 85 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2021-12-06 22:23:44,598 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 33 [2021-12-06 22:23:44,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:44,599 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2021-12-06 22:23:44,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:44,599 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2021-12-06 22:23:44,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 22:23:44,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:44,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:44,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 22:23:44,600 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:44,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:44,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1863084158, now seen corresponding path program 1 times [2021-12-06 22:23:44,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:44,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864753004] [2021-12-06 22:23:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:44,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:44,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:44,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:44,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864753004] [2021-12-06 22:23:44,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864753004] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:44,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664225618] [2021-12-06 22:23:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:44,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:44,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:44,670 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:44,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 22:23:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:44,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 22:23:44,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:44,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:23:44,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:23:44,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:23:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 22:23:44,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:23:44,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664225618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:44,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:23:44,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-06 22:23:44,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893406559] [2021-12-06 22:23:44,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:44,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:23:44,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:44,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:23:44,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:23:44,825 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:44,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:44,877 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2021-12-06 22:23:44,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:23:44,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-06 22:23:44,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:44,878 INFO L225 Difference]: With dead ends: 91 [2021-12-06 22:23:44,878 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 22:23:44,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:23:44,878 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 127 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:44,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 131 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:44,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 22:23:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2021-12-06 22:23:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 77 states have (on average 1.2857142857142858) internal successors, (99), 88 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2021-12-06 22:23:44,881 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 33 [2021-12-06 22:23:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:44,881 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2021-12-06 22:23:44,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2021-12-06 22:23:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 22:23:44,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:44,882 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:44,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 22:23:45,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:45,083 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:45,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:45,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1878769906, now seen corresponding path program 2 times [2021-12-06 22:23:45,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:45,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924327755] [2021-12-06 22:23:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:45,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:45,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:45,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924327755] [2021-12-06 22:23:45,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924327755] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:45,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702572847] [2021-12-06 22:23:45,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:23:45,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:45,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:45,207 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:45,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 22:23:45,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:23:45,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:23:45,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 22:23:45,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:45,270 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:23:45,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:23:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:45,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:23:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:45,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702572847] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:23:45,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:23:45,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2021-12-06 22:23:45,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248408486] [2021-12-06 22:23:45,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:23:45,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 22:23:45,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:45,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 22:23:45,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-12-06 22:23:45,624 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 29 states, 28 states have (on average 3.357142857142857) internal successors, (94), 29 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:46,061 INFO L93 Difference]: Finished difference Result 211 states and 238 transitions. [2021-12-06 22:23:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:23:46,061 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.357142857142857) internal successors, (94), 29 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-06 22:23:46,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:46,062 INFO L225 Difference]: With dead ends: 211 [2021-12-06 22:23:46,063 INFO L226 Difference]: Without dead ends: 211 [2021-12-06 22:23:46,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 22:23:46,064 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 999 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:46,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [999 Valid, 826 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:23:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-06 22:23:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 92. [2021-12-06 22:23:46,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 80 states have (on average 1.2875) internal successors, (103), 91 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2021-12-06 22:23:46,067 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 34 [2021-12-06 22:23:46,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:46,068 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2021-12-06 22:23:46,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.357142857142857) internal successors, (94), 29 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:46,068 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2021-12-06 22:23:46,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 22:23:46,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:46,068 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:46,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 22:23:46,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:46,270 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:46,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1579516876, now seen corresponding path program 3 times [2021-12-06 22:23:46,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:46,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265927757] [2021-12-06 22:23:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:46,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:46,433 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:23:46,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:46,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265927757] [2021-12-06 22:23:46,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265927757] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:46,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759607537] [2021-12-06 22:23:46,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:23:46,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:46,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:46,435 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:46,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 22:23:46,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 22:23:46,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:23:46,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 22:23:46,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:46,500 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:23:46,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:23:46,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 22:23:46,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:23:46,676 INFO L354 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2021-12-06 22:23:46,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-12-06 22:23:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 22:23:46,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:23:47,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-06 22:23:47,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:23:47,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2021-12-06 22:23:47,328 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 22:23:47,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759607537] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:23:47,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:23:47,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2021-12-06 22:23:47,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490978704] [2021-12-06 22:23:47,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:23:47,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 22:23:47,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:47,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 22:23:47,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 22:23:47,330 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:48,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:48,766 INFO L93 Difference]: Finished difference Result 264 states and 298 transitions. [2021-12-06 22:23:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 22:23:48,766 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-06 22:23:48,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:48,767 INFO L225 Difference]: With dead ends: 264 [2021-12-06 22:23:48,767 INFO L226 Difference]: Without dead ends: 264 [2021-12-06 22:23:48,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=708, Invalid=3452, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 22:23:48,769 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 972 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:48,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 1616 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1260 Invalid, 0 Unknown, 39 Unchecked, 0.5s Time] [2021-12-06 22:23:48,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-06 22:23:48,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 100. [2021-12-06 22:23:48,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 89 states have (on average 1.2584269662921348) internal successors, (112), 99 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2021-12-06 22:23:48,772 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 37 [2021-12-06 22:23:48,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:48,772 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2021-12-06 22:23:48,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:48,772 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2021-12-06 22:23:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 22:23:48,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:48,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:48,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 22:23:48,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:48,973 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:48,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:48,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1768471691, now seen corresponding path program 1 times [2021-12-06 22:23:48,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:48,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308577155] [2021-12-06 22:23:48,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:48,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:49,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:49,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308577155] [2021-12-06 22:23:49,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308577155] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:49,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222879266] [2021-12-06 22:23:49,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:49,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:49,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:49,088 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:49,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 22:23:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:49,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 22:23:49,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:49,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:23:49,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:23:49,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 22:23:49,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:23:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 22:23:49,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:23:49,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222879266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:49,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:23:49,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 13 [2021-12-06 22:23:49,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14263386] [2021-12-06 22:23:49,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:49,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 22:23:49,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:49,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 22:23:49,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:23:49,262 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:49,345 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2021-12-06 22:23:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:23:49,345 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-06 22:23:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:49,346 INFO L225 Difference]: With dead ends: 151 [2021-12-06 22:23:49,346 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 22:23:49,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:23:49,346 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 44 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:49,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 479 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 22:23:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-12-06 22:23:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 92 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2021-12-06 22:23:49,348 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 38 [2021-12-06 22:23:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:49,348 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2021-12-06 22:23:49,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2021-12-06 22:23:49,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 22:23:49,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:49,349 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:49,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 22:23:49,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 22:23:49,551 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:49,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:49,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1374104905, now seen corresponding path program 1 times [2021-12-06 22:23:49,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:49,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978928483] [2021-12-06 22:23:49,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:49,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:49,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:49,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978928483] [2021-12-06 22:23:49,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978928483] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:49,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120085168] [2021-12-06 22:23:49,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:49,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:49,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:49,760 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:49,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 22:23:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:49,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 22:23:49,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:49,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:23:49,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:23:49,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:23:50,054 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-06 22:23:50,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-06 22:23:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:50,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:23:50,137 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_497 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_497) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) is different from false [2021-12-06 22:23:50,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:23:50,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-06 22:23:50,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:23:50,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 22:23:50,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 22:23:50,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:23:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:50,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120085168] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:23:50,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:23:50,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2021-12-06 22:23:50,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795280817] [2021-12-06 22:23:50,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:23:50,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 22:23:50,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:50,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 22:23:50,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=672, Unknown=1, NotChecked=52, Total=812 [2021-12-06 22:23:50,295 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:50,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:50,596 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2021-12-06 22:23:50,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:23:50,596 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-06 22:23:50,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:50,597 INFO L225 Difference]: With dead ends: 155 [2021-12-06 22:23:50,597 INFO L226 Difference]: Without dead ends: 104 [2021-12-06 22:23:50,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=1168, Unknown=1, NotChecked=72, Total=1482 [2021-12-06 22:23:50,597 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 315 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:50,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 835 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 265 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2021-12-06 22:23:50,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-06 22:23:50,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2021-12-06 22:23:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 86 states have (on average 1.255813953488372) internal successors, (108), 96 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:50,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2021-12-06 22:23:50,600 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 38 [2021-12-06 22:23:50,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:50,600 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2021-12-06 22:23:50,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:50,600 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2021-12-06 22:23:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 22:23:50,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:50,601 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:50,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 22:23:50,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 22:23:50,802 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:50,803 INFO L85 PathProgramCache]: Analyzing trace with hash 514562726, now seen corresponding path program 2 times [2021-12-06 22:23:50,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:50,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653734416] [2021-12-06 22:23:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:50,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:50,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:50,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653734416] [2021-12-06 22:23:50,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653734416] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:50,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538723753] [2021-12-06 22:23:50,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:23:50,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:50,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:50,914 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:50,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 22:23:50,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:23:50,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:23:50,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 22:23:50,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:51,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:23:51,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 22:23:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:51,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538723753] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:23:51,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:23:51,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-06 22:23:51,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805398709] [2021-12-06 22:23:51,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:23:51,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:23:51,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:51,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:23:51,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:23:51,225 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 20 states, 19 states have (on average 4.473684210526316) internal successors, (85), 20 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:51,430 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2021-12-06 22:23:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 22:23:51,430 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.473684210526316) internal successors, (85), 20 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-06 22:23:51,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:51,431 INFO L225 Difference]: With dead ends: 133 [2021-12-06 22:23:51,431 INFO L226 Difference]: Without dead ends: 133 [2021-12-06 22:23:51,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-12-06 22:23:51,432 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 504 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:51,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 312 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:23:51,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-06 22:23:51,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 120. [2021-12-06 22:23:51,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 119 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 146 transitions. [2021-12-06 22:23:51,439 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 146 transitions. Word has length 42 [2021-12-06 22:23:51,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:51,439 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 146 transitions. [2021-12-06 22:23:51,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.473684210526316) internal successors, (85), 20 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:51,440 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 146 transitions. [2021-12-06 22:23:51,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 22:23:51,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:51,440 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:51,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 22:23:51,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 22:23:51,641 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:51,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:51,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1228465231, now seen corresponding path program 1 times [2021-12-06 22:23:51,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:51,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269075799] [2021-12-06 22:23:51,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:51,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 22:23:51,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:51,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269075799] [2021-12-06 22:23:51,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269075799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:51,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:51,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:23:51,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866605570] [2021-12-06 22:23:51,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:51,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:23:51,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:51,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:23:51,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:23:51,709 INFO L87 Difference]: Start difference. First operand 120 states and 146 transitions. Second operand has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:51,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:51,745 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2021-12-06 22:23:51,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:23:51,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-06 22:23:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:51,746 INFO L225 Difference]: With dead ends: 127 [2021-12-06 22:23:51,746 INFO L226 Difference]: Without dead ends: 127 [2021-12-06 22:23:51,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:23:51,747 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 110 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:51,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 87 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:51,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-06 22:23:51,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2021-12-06 22:23:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 109 states have (on average 1.3027522935779816) internal successors, (142), 117 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2021-12-06 22:23:51,749 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 43 [2021-12-06 22:23:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:51,749 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2021-12-06 22:23:51,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.25) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:51,750 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2021-12-06 22:23:51,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 22:23:51,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:51,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:51,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 22:23:51,750 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:51,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:51,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1228465230, now seen corresponding path program 1 times [2021-12-06 22:23:51,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:51,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651213387] [2021-12-06 22:23:51,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:51,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:51,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:51,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651213387] [2021-12-06 22:23:51,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651213387] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:51,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261379056] [2021-12-06 22:23:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:51,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:51,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:51,844 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:51,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 22:23:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:51,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 22:23:51,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:52,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:23:52,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 22:23:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:52,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261379056] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:23:52,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:23:52,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2021-12-06 22:23:52,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706322138] [2021-12-06 22:23:52,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:23:52,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:23:52,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:52,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:23:52,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:23:52,172 INFO L87 Difference]: Start difference. First operand 118 states and 142 transitions. Second operand has 19 states, 18 states have (on average 5.388888888888889) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:52,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:52,361 INFO L93 Difference]: Finished difference Result 164 states and 183 transitions. [2021-12-06 22:23:52,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 22:23:52,361 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.388888888888889) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-06 22:23:52,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:52,362 INFO L225 Difference]: With dead ends: 164 [2021-12-06 22:23:52,362 INFO L226 Difference]: Without dead ends: 164 [2021-12-06 22:23:52,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-12-06 22:23:52,363 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 429 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:52,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 323 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:23:52,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-06 22:23:52,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 118. [2021-12-06 22:23:52,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 110 states have (on average 1.2818181818181817) internal successors, (141), 117 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 141 transitions. [2021-12-06 22:23:52,365 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 141 transitions. Word has length 43 [2021-12-06 22:23:52,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:52,366 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 141 transitions. [2021-12-06 22:23:52,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.388888888888889) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:52,366 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 141 transitions. [2021-12-06 22:23:52,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 22:23:52,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:52,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:52,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 22:23:52,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:52,567 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:52,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:52,568 INFO L85 PathProgramCache]: Analyzing trace with hash 560922322, now seen corresponding path program 1 times [2021-12-06 22:23:52,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:52,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852534873] [2021-12-06 22:23:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:52,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 22:23:52,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:52,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852534873] [2021-12-06 22:23:52,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852534873] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:52,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:52,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:23:52,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909978347] [2021-12-06 22:23:52,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:52,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:23:52,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:52,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:23:52,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:23:52,685 INFO L87 Difference]: Start difference. First operand 118 states and 141 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:52,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:52,740 INFO L93 Difference]: Finished difference Result 128 states and 151 transitions. [2021-12-06 22:23:52,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:23:52,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-06 22:23:52,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:52,741 INFO L225 Difference]: With dead ends: 128 [2021-12-06 22:23:52,741 INFO L226 Difference]: Without dead ends: 128 [2021-12-06 22:23:52,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:23:52,742 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 98 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:52,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 159 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:52,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-06 22:23:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 117. [2021-12-06 22:23:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 110 states have (on average 1.2636363636363637) internal successors, (139), 116 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2021-12-06 22:23:52,745 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 45 [2021-12-06 22:23:52,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:52,745 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2021-12-06 22:23:52,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2021-12-06 22:23:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 22:23:52,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:52,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:52,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 22:23:52,746 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:52,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:52,746 INFO L85 PathProgramCache]: Analyzing trace with hash 560922323, now seen corresponding path program 1 times [2021-12-06 22:23:52,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:52,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607403391] [2021-12-06 22:23:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:52,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:52,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:52,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607403391] [2021-12-06 22:23:52,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607403391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:52,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539231595] [2021-12-06 22:23:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:52,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:52,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:52,857 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:52,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 22:23:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:52,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 22:23:52,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:52,936 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:23:52,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:23:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:53,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:23:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:53,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539231595] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:53,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:23:53,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2021-12-06 22:23:53,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302812035] [2021-12-06 22:23:53,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:53,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 22:23:53,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:53,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 22:23:53,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-12-06 22:23:53,383 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:53,512 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2021-12-06 22:23:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 22:23:53,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 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 45 [2021-12-06 22:23:53,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:53,513 INFO L225 Difference]: With dead ends: 138 [2021-12-06 22:23:53,513 INFO L226 Difference]: Without dead ends: 138 [2021-12-06 22:23:53,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 22:23:53,514 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 225 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:53,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 177 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:23:53,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-06 22:23:53,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 122. [2021-12-06 22:23:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 115 states have (on average 1.2608695652173914) internal successors, (145), 121 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2021-12-06 22:23:53,517 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 45 [2021-12-06 22:23:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:53,517 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2021-12-06 22:23:53,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2021-12-06 22:23:53,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 22:23:53,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:53,518 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:53,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 22:23:53,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:53,719 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:53,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:53,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2119524429, now seen corresponding path program 1 times [2021-12-06 22:23:53,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:53,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483255250] [2021-12-06 22:23:53,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:53,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 22:23:53,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:53,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483255250] [2021-12-06 22:23:53,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483255250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:53,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:53,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:23:53,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758777873] [2021-12-06 22:23:53,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:53,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:23:53,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:53,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:23:53,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:23:53,787 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:53,832 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2021-12-06 22:23:53,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:23:53,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 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 47 [2021-12-06 22:23:53,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:53,833 INFO L225 Difference]: With dead ends: 130 [2021-12-06 22:23:53,833 INFO L226 Difference]: Without dead ends: 130 [2021-12-06 22:23:53,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:23:53,834 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 100 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:53,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 130 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:53,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-06 22:23:53,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2021-12-06 22:23:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 115 states have (on average 1.2434782608695651) internal successors, (143), 120 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:53,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2021-12-06 22:23:53,836 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 47 [2021-12-06 22:23:53,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:53,837 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2021-12-06 22:23:53,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:53,837 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2021-12-06 22:23:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 22:23:53,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:53,837 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:53,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 22:23:53,838 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:53,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:53,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2119524428, now seen corresponding path program 1 times [2021-12-06 22:23:53,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:53,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185502128] [2021-12-06 22:23:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:53,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:53,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:53,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185502128] [2021-12-06 22:23:53,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185502128] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:53,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548548316] [2021-12-06 22:23:53,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:53,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:53,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:53,929 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:53,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 22:23:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:54,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 22:23:54,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:54,031 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:23:54,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:23:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:54,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:23:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:54,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548548316] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:54,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:23:54,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9, 12] total 31 [2021-12-06 22:23:54,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331458155] [2021-12-06 22:23:54,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:54,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 22:23:54,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:54,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 22:23:54,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-12-06 22:23:54,834 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:55,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:55,129 INFO L93 Difference]: Finished difference Result 151 states and 170 transitions. [2021-12-06 22:23:55,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:23:55,129 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-06 22:23:55,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:55,130 INFO L225 Difference]: With dead ends: 151 [2021-12-06 22:23:55,130 INFO L226 Difference]: Without dead ends: 151 [2021-12-06 22:23:55,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 22:23:55,131 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 330 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:55,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 281 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:23:55,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-06 22:23:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2021-12-06 22:23:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 119 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:55,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2021-12-06 22:23:55,134 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 47 [2021-12-06 22:23:55,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:55,134 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2021-12-06 22:23:55,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:55,134 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2021-12-06 22:23:55,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 22:23:55,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:55,135 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:55,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 22:23:55,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 22:23:55,335 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:55,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:55,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1002087267, now seen corresponding path program 3 times [2021-12-06 22:23:55,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:55,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122217675] [2021-12-06 22:23:55,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:55,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:55,494 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:55,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:55,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122217675] [2021-12-06 22:23:55,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122217675] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:55,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704542769] [2021-12-06 22:23:55,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:23:55,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:55,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:55,495 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:55,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 22:23:55,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 22:23:55,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:23:55,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 22:23:55,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:55,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:23:55,725 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:23:55,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-06 22:23:55,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2021-12-06 22:23:56,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:23:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:56,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:23:56,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:23:56,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:23:56,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:23:56,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:23:56,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:23:56,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2021-12-06 22:23:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:56,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704542769] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:23:56,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:23:56,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 37 [2021-12-06 22:23:56,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967708244] [2021-12-06 22:23:56,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:23:56,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 22:23:56,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:56,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 22:23:56,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1219, Unknown=1, NotChecked=0, Total=1332 [2021-12-06 22:23:56,395 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 37 states, 37 states have (on average 2.7837837837837838) internal successors, (103), 37 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:56,881 INFO L93 Difference]: Finished difference Result 206 states and 237 transitions. [2021-12-06 22:23:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 22:23:56,881 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.7837837837837838) internal successors, (103), 37 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-06 22:23:56,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:56,882 INFO L225 Difference]: With dead ends: 206 [2021-12-06 22:23:56,882 INFO L226 Difference]: Without dead ends: 197 [2021-12-06 22:23:56,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=2168, Unknown=1, NotChecked=0, Total=2450 [2021-12-06 22:23:56,883 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 177 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:56,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 855 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 491 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2021-12-06 22:23:56,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-06 22:23:56,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2021-12-06 22:23:56,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.1945945945945946) internal successors, (221), 189 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 221 transitions. [2021-12-06 22:23:56,886 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 221 transitions. Word has length 47 [2021-12-06 22:23:56,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:56,886 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 221 transitions. [2021-12-06 22:23:56,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.7837837837837838) internal successors, (103), 37 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:56,887 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 221 transitions. [2021-12-06 22:23:56,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 22:23:56,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:56,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:56,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-06 22:23:57,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:57,088 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:57,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:57,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1048782252, now seen corresponding path program 1 times [2021-12-06 22:23:57,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:57,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051984737] [2021-12-06 22:23:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:57,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 22:23:57,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:57,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051984737] [2021-12-06 22:23:57,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051984737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:57,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:57,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:23:57,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444707147] [2021-12-06 22:23:57,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:57,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:23:57,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:57,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:23:57,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:23:57,119 INFO L87 Difference]: Start difference. First operand 190 states and 221 transitions. Second operand has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:57,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:57,161 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2021-12-06 22:23:57,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:23:57,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 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 49 [2021-12-06 22:23:57,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:57,163 INFO L225 Difference]: With dead ends: 200 [2021-12-06 22:23:57,164 INFO L226 Difference]: Without dead ends: 200 [2021-12-06 22:23:57,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:23:57,164 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 86 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:57,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 158 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:57,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-06 22:23:57,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 189. [2021-12-06 22:23:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 185 states have (on average 1.1783783783783783) internal successors, (218), 188 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 218 transitions. [2021-12-06 22:23:57,169 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 218 transitions. Word has length 49 [2021-12-06 22:23:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:57,169 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 218 transitions. [2021-12-06 22:23:57,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.2) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 218 transitions. [2021-12-06 22:23:57,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 22:23:57,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:57,169 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:57,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-06 22:23:57,170 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:57,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:57,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1048782251, now seen corresponding path program 1 times [2021-12-06 22:23:57,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:57,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150600668] [2021-12-06 22:23:57,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:57,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:57,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:57,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150600668] [2021-12-06 22:23:57,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150600668] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:57,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414814164] [2021-12-06 22:23:57,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:57,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:57,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:57,278 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:57,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 22:23:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:57,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 22:23:57,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:57,365 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:23:57,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:23:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:57,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:23:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:57,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414814164] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:57,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:23:57,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11, 10] total 29 [2021-12-06 22:23:57,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205952182] [2021-12-06 22:23:57,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:57,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 22:23:57,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:57,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 22:23:57,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-12-06 22:23:57,840 INFO L87 Difference]: Start difference. First operand 189 states and 218 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:58,028 INFO L93 Difference]: Finished difference Result 255 states and 293 transitions. [2021-12-06 22:23:58,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 22:23:58,029 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-06 22:23:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:58,030 INFO L225 Difference]: With dead ends: 255 [2021-12-06 22:23:58,030 INFO L226 Difference]: Without dead ends: 252 [2021-12-06 22:23:58,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 22:23:58,031 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 302 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:58,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 233 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:23:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-06 22:23:58,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 198. [2021-12-06 22:23:58,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 194 states have (on average 1.1804123711340206) internal successors, (229), 197 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 229 transitions. [2021-12-06 22:23:58,035 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 229 transitions. Word has length 49 [2021-12-06 22:23:58,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:58,036 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 229 transitions. [2021-12-06 22:23:58,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 229 transitions. [2021-12-06 22:23:58,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 22:23:58,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:58,036 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:58,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 22:23:58,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 22:23:58,237 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:58,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:58,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1733532468, now seen corresponding path program 1 times [2021-12-06 22:23:58,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:58,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340416687] [2021-12-06 22:23:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:58,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 22:23:58,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:58,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340416687] [2021-12-06 22:23:58,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340416687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:23:58,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:23:58,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:23:58,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332919254] [2021-12-06 22:23:58,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:23:58,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:23:58,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:58,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:23:58,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:23:58,304 INFO L87 Difference]: Start difference. First operand 198 states and 229 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:58,340 INFO L93 Difference]: Finished difference Result 223 states and 254 transitions. [2021-12-06 22:23:58,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:23:58,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-06 22:23:58,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:58,341 INFO L225 Difference]: With dead ends: 223 [2021-12-06 22:23:58,341 INFO L226 Difference]: Without dead ends: 205 [2021-12-06 22:23:58,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:23:58,342 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 45 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:58,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 279 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:23:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-06 22:23:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 194. [2021-12-06 22:23:58,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 190 states have (on average 1.1736842105263159) internal successors, (223), 193 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:58,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 223 transitions. [2021-12-06 22:23:58,347 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 223 transitions. Word has length 51 [2021-12-06 22:23:58,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:58,347 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 223 transitions. [2021-12-06 22:23:58,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:58,347 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 223 transitions. [2021-12-06 22:23:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 22:23:58,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:58,348 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:58,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-06 22:23:58,348 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1890652506, now seen corresponding path program 4 times [2021-12-06 22:23:58,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:58,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365625488] [2021-12-06 22:23:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:58,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:58,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:58,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365625488] [2021-12-06 22:23:58,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365625488] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:58,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548694548] [2021-12-06 22:23:58,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:23:58,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:58,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:58,451 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:58,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 22:23:58,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:23:58,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:23:58,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 22:23:58,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:58,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:23:58,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 22:23:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:23:58,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548694548] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:23:58,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:23:58,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-12-06 22:23:58,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992649289] [2021-12-06 22:23:58,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:23:58,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 22:23:58,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:23:58,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 22:23:58,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:23:58,869 INFO L87 Difference]: Start difference. First operand 194 states and 223 transitions. Second operand has 23 states, 22 states have (on average 5.136363636363637) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:23:59,205 INFO L93 Difference]: Finished difference Result 320 states and 371 transitions. [2021-12-06 22:23:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:23:59,205 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.136363636363637) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-06 22:23:59,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:23:59,206 INFO L225 Difference]: With dead ends: 320 [2021-12-06 22:23:59,206 INFO L226 Difference]: Without dead ends: 320 [2021-12-06 22:23:59,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-12-06 22:23:59,207 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 561 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:23:59,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 820 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:23:59,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-06 22:23:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 251. [2021-12-06 22:23:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 247 states have (on average 1.1902834008097165) internal successors, (294), 250 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 294 transitions. [2021-12-06 22:23:59,215 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 294 transitions. Word has length 51 [2021-12-06 22:23:59,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:23:59,215 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 294 transitions. [2021-12-06 22:23:59,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.136363636363637) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:23:59,216 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 294 transitions. [2021-12-06 22:23:59,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 22:23:59,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:23:59,216 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:23:59,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 22:23:59,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 22:23:59,417 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:23:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:23:59,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1409711930, now seen corresponding path program 1 times [2021-12-06 22:23:59,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:23:59,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457252267] [2021-12-06 22:23:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:59,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:23:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:23:59,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:23:59,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457252267] [2021-12-06 22:23:59,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457252267] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:23:59,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083582588] [2021-12-06 22:23:59,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:23:59,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:23:59,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:23:59,657 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:23:59,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 22:23:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:23:59,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 22:23:59,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:23:59,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:23:59,970 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:23:59,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-06 22:23:59,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2021-12-06 22:24:00,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:24:00,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:24:00,851 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 22:24:00,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 18 [2021-12-06 22:24:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:00,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:01,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:01,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2021-12-06 22:24:01,087 INFO L354 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2021-12-06 22:24:01,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 61 [2021-12-06 22:24:01,099 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-12-06 22:24:01,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 41 [2021-12-06 22:24:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:01,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083582588] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:01,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:01,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 19] total 42 [2021-12-06 22:24:01,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029745869] [2021-12-06 22:24:01,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:01,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 22:24:01,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:01,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 22:24:01,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1592, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 22:24:01,326 INFO L87 Difference]: Start difference. First operand 251 states and 294 transitions. Second operand has 42 states, 42 states have (on average 2.738095238095238) internal successors, (115), 42 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:02,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:02,621 INFO L93 Difference]: Finished difference Result 281 states and 321 transitions. [2021-12-06 22:24:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:24:02,621 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.738095238095238) internal successors, (115), 42 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 22:24:02,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:02,622 INFO L225 Difference]: With dead ends: 281 [2021-12-06 22:24:02,622 INFO L226 Difference]: Without dead ends: 270 [2021-12-06 22:24:02,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=333, Invalid=3448, Unknown=1, NotChecked=0, Total=3782 [2021-12-06 22:24:02,623 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 120 mSDsluCounter, 1826 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:02,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 1883 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 404 Invalid, 0 Unknown, 497 Unchecked, 0.1s Time] [2021-12-06 22:24:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-06 22:24:02,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 251. [2021-12-06 22:24:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 247 states have (on average 1.1821862348178138) internal successors, (292), 250 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:02,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 292 transitions. [2021-12-06 22:24:02,628 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 292 transitions. Word has length 54 [2021-12-06 22:24:02,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:02,628 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 292 transitions. [2021-12-06 22:24:02,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.738095238095238) internal successors, (115), 42 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 292 transitions. [2021-12-06 22:24:02,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 22:24:02,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:02,629 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:02,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 22:24:02,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 22:24:02,830 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:02,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:02,831 INFO L85 PathProgramCache]: Analyzing trace with hash 269209443, now seen corresponding path program 5 times [2021-12-06 22:24:02,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:02,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788590584] [2021-12-06 22:24:02,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:02,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:24:03,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:03,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788590584] [2021-12-06 22:24:03,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788590584] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:03,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932357779] [2021-12-06 22:24:03,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:24:03,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:03,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:03,297 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:03,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 22:24:03,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 22:24:03,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:24:03,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 22:24:03,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:03,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:24:03,631 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:24:03,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-06 22:24:03,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2021-12-06 22:24:04,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:24:04,606 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 22:24:04,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 21 [2021-12-06 22:24:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:04,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:05,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:05,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2021-12-06 22:24:05,011 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-06 22:24:05,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 59 [2021-12-06 22:24:05,022 INFO L354 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2021-12-06 22:24:05,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 37 [2021-12-06 22:24:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:05,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932357779] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:05,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:05,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 56 [2021-12-06 22:24:05,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790128943] [2021-12-06 22:24:05,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:05,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 22:24:05,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:05,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 22:24:05,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2885, Unknown=6, NotChecked=0, Total=3080 [2021-12-06 22:24:05,466 INFO L87 Difference]: Start difference. First operand 251 states and 292 transitions. Second operand has 56 states, 56 states have (on average 2.482142857142857) internal successors, (139), 56 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:06,149 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~length1~0#1|))) (and (or (<= |c_ULTIMATE.start_main_~i~0#1| 2) (< .cse0 (+ |c_ULTIMATE.start_main_~length2~0#1| 2))) (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (= 2 |c_ULTIMATE.start_main_~i~0#1|) (or (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (= |c_ULTIMATE.start_main_~nondetString2~0#1.offset| (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1))) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (forall ((v_ArrVal_915 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_915) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse1 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (not (= (select v_ArrVal_915 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0))))) (or (= |c_ULTIMATE.start_main_~length1~0#1| 2) (= |c_ULTIMATE.start_main_~length1~0#1| 3)) (or (<= (+ |c_ULTIMATE.start_main_~length2~0#1| 1) .cse0) (<= 2 |c_ULTIMATE.start_main_~i~0#1|)))) is different from false [2021-12-06 22:24:07,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:07,165 INFO L93 Difference]: Finished difference Result 351 states and 402 transitions. [2021-12-06 22:24:07,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 22:24:07,165 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.482142857142857) internal successors, (139), 56 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-06 22:24:07,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:07,167 INFO L225 Difference]: With dead ends: 351 [2021-12-06 22:24:07,167 INFO L226 Difference]: Without dead ends: 345 [2021-12-06 22:24:07,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=625, Invalid=7382, Unknown=7, NotChecked=176, Total=8190 [2021-12-06 22:24:07,170 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 268 mSDsluCounter, 1431 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:07,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 1483 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 880 Invalid, 0 Unknown, 347 Unchecked, 0.3s Time] [2021-12-06 22:24:07,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-12-06 22:24:07,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 323. [2021-12-06 22:24:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 319 states have (on average 1.1661442006269593) internal successors, (372), 322 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 372 transitions. [2021-12-06 22:24:07,177 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 372 transitions. Word has length 56 [2021-12-06 22:24:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:07,178 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 372 transitions. [2021-12-06 22:24:07,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.482142857142857) internal successors, (139), 56 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 372 transitions. [2021-12-06 22:24:07,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 22:24:07,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:07,179 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:07,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 22:24:07,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 22:24:07,379 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:07,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:07,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2081403787, now seen corresponding path program 1 times [2021-12-06 22:24:07,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:07,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754183788] [2021-12-06 22:24:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:07,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 22:24:07,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:07,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754183788] [2021-12-06 22:24:07,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754183788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:07,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670039089] [2021-12-06 22:24:07,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:07,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:07,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:07,459 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:07,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 22:24:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:07,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 22:24:07,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:07,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:24:07,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:24:07,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 22:24:08,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:24:08,222 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 22:24:08,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 21 [2021-12-06 22:24:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:24:08,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:08,551 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-12-06 22:24:08,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 182 [2021-12-06 22:24:08,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:08,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 176 [2021-12-06 22:24:08,606 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-12-06 22:24:08,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-12-06 22:24:08,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:08,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 79 [2021-12-06 22:24:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:24:08,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670039089] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:08,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:08,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 22, 22] total 48 [2021-12-06 22:24:08,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685756843] [2021-12-06 22:24:08,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:08,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 22:24:08,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:08,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 22:24:08,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2095, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 22:24:08,934 INFO L87 Difference]: Start difference. First operand 323 states and 372 transitions. Second operand has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:09,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:09,499 INFO L93 Difference]: Finished difference Result 440 states and 502 transitions. [2021-12-06 22:24:09,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 22:24:09,499 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-06 22:24:09,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:09,501 INFO L225 Difference]: With dead ends: 440 [2021-12-06 22:24:09,501 INFO L226 Difference]: Without dead ends: 440 [2021-12-06 22:24:09,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=330, Invalid=3960, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 22:24:09,502 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 102 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:09,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1568 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 700 Invalid, 0 Unknown, 156 Unchecked, 0.2s Time] [2021-12-06 22:24:09,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-12-06 22:24:09,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 379. [2021-12-06 22:24:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 375 states have (on average 1.176) internal successors, (441), 378 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:09,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 441 transitions. [2021-12-06 22:24:09,508 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 441 transitions. Word has length 58 [2021-12-06 22:24:09,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:09,508 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 441 transitions. [2021-12-06 22:24:09,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:09,508 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 441 transitions. [2021-12-06 22:24:09,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 22:24:09,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:09,509 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:09,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 22:24:09,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 22:24:09,710 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:09,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:09,711 INFO L85 PathProgramCache]: Analyzing trace with hash -2033507871, now seen corresponding path program 1 times [2021-12-06 22:24:09,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:09,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140589182] [2021-12-06 22:24:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:09,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:09,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:09,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140589182] [2021-12-06 22:24:09,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140589182] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:09,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955768593] [2021-12-06 22:24:09,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:09,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:09,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:09,838 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:09,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 22:24:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:09,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 22:24:09,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:09,927 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:24:09,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:24:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:24:10,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:24:10,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955768593] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:10,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:10,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 36 [2021-12-06 22:24:10,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088390701] [2021-12-06 22:24:10,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:10,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 22:24:10,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:10,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 22:24:10,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 22:24:10,859 INFO L87 Difference]: Start difference. First operand 379 states and 441 transitions. Second operand has 37 states, 36 states have (on average 4.388888888888889) internal successors, (158), 37 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:11,300 INFO L93 Difference]: Finished difference Result 457 states and 519 transitions. [2021-12-06 22:24:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 22:24:11,300 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.388888888888889) internal successors, (158), 37 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-06 22:24:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:11,302 INFO L225 Difference]: With dead ends: 457 [2021-12-06 22:24:11,302 INFO L226 Difference]: Without dead ends: 457 [2021-12-06 22:24:11,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=367, Invalid=2285, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 22:24:11,303 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 432 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:11,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 1008 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 567 Invalid, 0 Unknown, 115 Unchecked, 0.2s Time] [2021-12-06 22:24:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-12-06 22:24:11,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 379. [2021-12-06 22:24:11,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 375 states have (on average 1.1706666666666667) internal successors, (439), 378 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 439 transitions. [2021-12-06 22:24:11,309 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 439 transitions. Word has length 59 [2021-12-06 22:24:11,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:11,309 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 439 transitions. [2021-12-06 22:24:11,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.388888888888889) internal successors, (158), 37 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:11,309 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 439 transitions. [2021-12-06 22:24:11,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 22:24:11,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:11,310 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:11,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 22:24:11,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:11,511 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:11,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:11,512 INFO L85 PathProgramCache]: Analyzing trace with hash -162234496, now seen corresponding path program 6 times [2021-12-06 22:24:11,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:11,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719834757] [2021-12-06 22:24:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:11,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:11,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:11,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719834757] [2021-12-06 22:24:11,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719834757] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:11,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643046716] [2021-12-06 22:24:11,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:24:11,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:11,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:11,666 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:11,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 22:24:11,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 22:24:11,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:24:11,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 22:24:11,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:11,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:12,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 18 [2021-12-06 22:24:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:12,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643046716] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:12,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:12,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2021-12-06 22:24:12,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985786605] [2021-12-06 22:24:12,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:12,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 22:24:12,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:12,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 22:24:12,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-12-06 22:24:12,222 INFO L87 Difference]: Start difference. First operand 379 states and 439 transitions. Second operand has 29 states, 28 states have (on average 5.178571428571429) internal successors, (145), 29 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:12,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:12,623 INFO L93 Difference]: Finished difference Result 678 states and 792 transitions. [2021-12-06 22:24:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 22:24:12,623 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.178571428571429) internal successors, (145), 29 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-06 22:24:12,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:12,626 INFO L225 Difference]: With dead ends: 678 [2021-12-06 22:24:12,626 INFO L226 Difference]: Without dead ends: 678 [2021-12-06 22:24:12,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=367, Invalid=1273, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 22:24:12,627 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 820 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:12,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 1396 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:24:12,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-12-06 22:24:12,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 510. [2021-12-06 22:24:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 506 states have (on average 1.1897233201581028) internal successors, (602), 509 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:12,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 602 transitions. [2021-12-06 22:24:12,637 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 602 transitions. Word has length 60 [2021-12-06 22:24:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:12,637 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 602 transitions. [2021-12-06 22:24:12,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.178571428571429) internal successors, (145), 29 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:12,638 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 602 transitions. [2021-12-06 22:24:12,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 22:24:12,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:12,639 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:12,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 22:24:12,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-06 22:24:12,840 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:12,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:12,841 INFO L85 PathProgramCache]: Analyzing trace with hash -429023240, now seen corresponding path program 1 times [2021-12-06 22:24:12,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:12,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450225889] [2021-12-06 22:24:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:12,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:24:12,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:12,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450225889] [2021-12-06 22:24:12,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450225889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:24:12,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:24:12,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:24:12,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242128736] [2021-12-06 22:24:12,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:24:12,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:24:12,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:12,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:24:12,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:24:12,881 INFO L87 Difference]: Start difference. First operand 510 states and 602 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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) [2021-12-06 22:24:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:12,890 INFO L93 Difference]: Finished difference Result 515 states and 597 transitions. [2021-12-06 22:24:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:24:12,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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) Word has length 61 [2021-12-06 22:24:12,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:12,892 INFO L225 Difference]: With dead ends: 515 [2021-12-06 22:24:12,892 INFO L226 Difference]: Without dead ends: 431 [2021-12-06 22:24:12,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:24:12,892 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:12,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 171 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:24:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-12-06 22:24:12,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 425. [2021-12-06 22:24:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 421 states have (on average 1.144893111638955) internal successors, (482), 424 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 482 transitions. [2021-12-06 22:24:12,898 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 482 transitions. Word has length 61 [2021-12-06 22:24:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:12,898 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 482 transitions. [2021-12-06 22:24:12,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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) [2021-12-06 22:24:12,898 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 482 transitions. [2021-12-06 22:24:12,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 22:24:12,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:12,899 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:12,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-06 22:24:12,899 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:12,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:12,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1058932206, now seen corresponding path program 2 times [2021-12-06 22:24:12,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:12,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560315759] [2021-12-06 22:24:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:12,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:13,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:13,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560315759] [2021-12-06 22:24:13,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560315759] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:13,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402024717] [2021-12-06 22:24:13,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:24:13,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:13,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:13,080 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:13,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 22:24:13,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:24:13,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:24:13,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-06 22:24:13,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:13,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:24:13,375 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:24:13,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-06 22:24:13,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2021-12-06 22:24:13,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:24:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:24:13,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:13,919 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int) (v_ArrVal_1107 (Array Int Int))) (or (not (= 0 (select v_ArrVal_1107 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 2)))) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1107) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0))) is different from false [2021-12-06 22:24:13,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:13,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:24:13,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:13,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:24:13,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:13,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2021-12-06 22:24:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:24:14,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402024717] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:14,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:14,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 44 [2021-12-06 22:24:14,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429363488] [2021-12-06 22:24:14,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:14,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 22:24:14,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:14,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 22:24:14,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1683, Unknown=1, NotChecked=82, Total=1892 [2021-12-06 22:24:14,143 INFO L87 Difference]: Start difference. First operand 425 states and 482 transitions. Second operand has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:14,416 WARN L838 $PredicateComparison]: unable to prove that (and (< 2 |c_ULTIMATE.start_main_~length1~0#1|) (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~i~0#1| 3) (exists ((|ULTIMATE.start_main_~length1~0#1| Int)) (and (< 2 |ULTIMATE.start_main_~length1~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~length1~0#1|)) 0) (<= |ULTIMATE.start_main_~length1~0#1| 3))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int) (v_ArrVal_1107 (Array Int Int))) (or (not (= 0 (select v_ArrVal_1107 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 2)))) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1107) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0))) (= |c_ULTIMATE.start_main_~length1~0#1| 3) (<= |c_ULTIMATE.start_main_~length1~0#1| 3)) is different from false [2021-12-06 22:24:14,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:14,740 INFO L93 Difference]: Finished difference Result 514 states and 572 transitions. [2021-12-06 22:24:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 22:24:14,740 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-06 22:24:14,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:14,742 INFO L225 Difference]: With dead ends: 514 [2021-12-06 22:24:14,742 INFO L226 Difference]: Without dead ends: 488 [2021-12-06 22:24:14,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=251, Invalid=3177, Unknown=2, NotChecked=230, Total=3660 [2021-12-06 22:24:14,743 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 339 mSDsluCounter, 2236 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 2336 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 376 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:14,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 2336 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1057 Invalid, 0 Unknown, 376 Unchecked, 0.3s Time] [2021-12-06 22:24:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-12-06 22:24:14,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 434. [2021-12-06 22:24:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 430 states have (on average 1.1418604651162791) internal successors, (491), 433 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 491 transitions. [2021-12-06 22:24:14,748 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 491 transitions. Word has length 63 [2021-12-06 22:24:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:14,748 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 491 transitions. [2021-12-06 22:24:14,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:14,748 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 491 transitions. [2021-12-06 22:24:14,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 22:24:14,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:14,749 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:14,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 22:24:14,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-06 22:24:14,950 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:14,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:14,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1912649417, now seen corresponding path program 7 times [2021-12-06 22:24:14,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:14,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863600224] [2021-12-06 22:24:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:14,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:15,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:15,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863600224] [2021-12-06 22:24:15,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863600224] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:15,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632775218] [2021-12-06 22:24:15,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:24:15,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:15,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:15,343 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:15,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 22:24:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:15,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 22:24:15,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:15,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:24:15,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:24:15,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:24:16,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:24:16,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:16,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-06 22:24:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:16,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:16,472 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1153 (Array Int Int)) (|v_ULTIMATE.start_cstrstr_#t~post17#1.offset_89| Int)) (or (< |v_ULTIMATE.start_cstrstr_#t~post17#1.offset_89| 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrstr_#t~post17#1.offset_89|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1153) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |v_ULTIMATE.start_cstrstr_#t~post17#1.offset_89|)) 0))) is different from false [2021-12-06 22:24:16,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:16,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:24:16,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:16,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:24:16,483 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 11 treesize of output 7 [2021-12-06 22:24:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:16,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632775218] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:16,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:16,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 48 [2021-12-06 22:24:16,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695756354] [2021-12-06 22:24:16,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:16,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 22:24:16,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:16,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 22:24:16,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2037, Unknown=1, NotChecked=90, Total=2256 [2021-12-06 22:24:16,964 INFO L87 Difference]: Start difference. First operand 434 states and 491 transitions. Second operand has 48 states, 48 states have (on average 3.1875) internal successors, (153), 48 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:18,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:18,060 INFO L93 Difference]: Finished difference Result 681 states and 754 transitions. [2021-12-06 22:24:18,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:24:18,061 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.1875) internal successors, (153), 48 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-06 22:24:18,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:18,063 INFO L225 Difference]: With dead ends: 681 [2021-12-06 22:24:18,063 INFO L226 Difference]: Without dead ends: 643 [2021-12-06 22:24:18,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=294, Invalid=4131, Unknown=1, NotChecked=130, Total=4556 [2021-12-06 22:24:18,064 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 466 mSDsluCounter, 3669 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 3791 SdHoareTripleChecker+Invalid, 2198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 785 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:18,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 3791 Invalid, 2198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1392 Invalid, 0 Unknown, 785 Unchecked, 0.4s Time] [2021-12-06 22:24:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-12-06 22:24:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 547. [2021-12-06 22:24:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 543 states have (on average 1.138121546961326) internal successors, (618), 546 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 618 transitions. [2021-12-06 22:24:18,070 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 618 transitions. Word has length 65 [2021-12-06 22:24:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:18,070 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 618 transitions. [2021-12-06 22:24:18,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.1875) internal successors, (153), 48 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 618 transitions. [2021-12-06 22:24:18,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 22:24:18,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:18,071 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:18,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 22:24:18,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:18,271 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:18,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:18,272 INFO L85 PathProgramCache]: Analyzing trace with hash 492825745, now seen corresponding path program 1 times [2021-12-06 22:24:18,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:18,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059464709] [2021-12-06 22:24:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:18,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:18,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:18,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059464709] [2021-12-06 22:24:18,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059464709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:18,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961244739] [2021-12-06 22:24:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:18,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:18,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:18,442 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:18,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 22:24:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:18,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 22:24:18,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:18,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:24:18,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:24:18,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:24:18,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:24:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:18,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:18,851 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1195 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1195) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2021-12-06 22:24:18,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:18,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:24:18,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:18,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:24:18,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:24:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:18,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961244739] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:18,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:18,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2021-12-06 22:24:18,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498585980] [2021-12-06 22:24:18,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:18,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 22:24:18,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:18,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 22:24:18,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=570, Unknown=1, NotChecked=48, Total=702 [2021-12-06 22:24:18,984 INFO L87 Difference]: Start difference. First operand 547 states and 618 transitions. Second operand has 27 states, 27 states have (on average 4.0) internal successors, (108), 27 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:19,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:19,263 INFO L93 Difference]: Finished difference Result 561 states and 631 transitions. [2021-12-06 22:24:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 22:24:19,263 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.0) internal successors, (108), 27 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-06 22:24:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:19,265 INFO L225 Difference]: With dead ends: 561 [2021-12-06 22:24:19,265 INFO L226 Difference]: Without dead ends: 496 [2021-12-06 22:24:19,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=1289, Unknown=1, NotChecked=74, Total=1560 [2021-12-06 22:24:19,265 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 95 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:19,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 802 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 409 Invalid, 0 Unknown, 119 Unchecked, 0.1s Time] [2021-12-06 22:24:19,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-12-06 22:24:19,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 496. [2021-12-06 22:24:19,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 492 states have (on average 1.1443089430894309) internal successors, (563), 495 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:19,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 563 transitions. [2021-12-06 22:24:19,270 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 563 transitions. Word has length 67 [2021-12-06 22:24:19,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:19,271 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 563 transitions. [2021-12-06 22:24:19,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.0) internal successors, (108), 27 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:19,271 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 563 transitions. [2021-12-06 22:24:19,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 22:24:19,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:19,271 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:19,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 22:24:19,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-06 22:24:19,472 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:19,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:19,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1370877155, now seen corresponding path program 2 times [2021-12-06 22:24:19,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:19,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828525774] [2021-12-06 22:24:19,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:19,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:19,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:19,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828525774] [2021-12-06 22:24:19,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828525774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:19,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884951757] [2021-12-06 22:24:19,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:24:19,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:19,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:19,598 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:19,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 22:24:19,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:24:19,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:24:19,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 22:24:19,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:19,707 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:24:19,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:24:20,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 22:24:20,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:20,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-12-06 22:24:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:20,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:20,922 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 37 treesize of output 31 [2021-12-06 22:24:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:21,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884951757] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:21,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:21,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 40 [2021-12-06 22:24:21,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251233386] [2021-12-06 22:24:21,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:21,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 22:24:21,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:21,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 22:24:21,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1465, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 22:24:21,739 INFO L87 Difference]: Start difference. First operand 496 states and 563 transitions. Second operand has 41 states, 40 states have (on average 4.225) internal successors, (169), 41 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:23,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:23,002 INFO L93 Difference]: Finished difference Result 614 states and 690 transitions. [2021-12-06 22:24:23,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 22:24:23,003 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.225) internal successors, (169), 41 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-06 22:24:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:23,005 INFO L225 Difference]: With dead ends: 614 [2021-12-06 22:24:23,005 INFO L226 Difference]: Without dead ends: 614 [2021-12-06 22:24:23,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=680, Invalid=3352, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 22:24:23,005 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 524 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:23,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 1324 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 719 Invalid, 0 Unknown, 323 Unchecked, 0.3s Time] [2021-12-06 22:24:23,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-12-06 22:24:23,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 514. [2021-12-06 22:24:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 510 states have (on average 1.1411764705882352) internal successors, (582), 513 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 582 transitions. [2021-12-06 22:24:23,011 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 582 transitions. Word has length 68 [2021-12-06 22:24:23,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:23,011 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 582 transitions. [2021-12-06 22:24:23,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.225) internal successors, (169), 41 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:23,011 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 582 transitions. [2021-12-06 22:24:23,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 22:24:23,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:23,012 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:23,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 22:24:23,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 22:24:23,213 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:23,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:23,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1333006979, now seen corresponding path program 2 times [2021-12-06 22:24:23,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:23,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614714667] [2021-12-06 22:24:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:23,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:24:23,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:23,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614714667] [2021-12-06 22:24:23,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614714667] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:23,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866557607] [2021-12-06 22:24:23,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:24:23,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:23,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:23,362 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:23,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 22:24:23,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:24:23,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:24:23,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 22:24:23,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:24:23,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:23,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-06 22:24:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:24:23,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866557607] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:23,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:23,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-12-06 22:24:23,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950082341] [2021-12-06 22:24:23,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:23,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 22:24:23,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:23,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 22:24:23,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-12-06 22:24:23,915 INFO L87 Difference]: Start difference. First operand 514 states and 582 transitions. Second operand has 26 states, 25 states have (on average 5.48) internal successors, (137), 26 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:24,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:24,213 INFO L93 Difference]: Finished difference Result 627 states and 703 transitions. [2021-12-06 22:24:24,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:24:24,213 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 5.48) internal successors, (137), 26 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-06 22:24:24,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:24,218 INFO L225 Difference]: With dead ends: 627 [2021-12-06 22:24:24,218 INFO L226 Difference]: Without dead ends: 627 [2021-12-06 22:24:24,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 22:24:24,218 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 721 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:24,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 361 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:24:24,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-12-06 22:24:24,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 524. [2021-12-06 22:24:24,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 520 states have (on average 1.1384615384615384) internal successors, (592), 523 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 592 transitions. [2021-12-06 22:24:24,224 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 592 transitions. Word has length 69 [2021-12-06 22:24:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:24,224 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 592 transitions. [2021-12-06 22:24:24,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 5.48) internal successors, (137), 26 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 592 transitions. [2021-12-06 22:24:24,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 22:24:24,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:24,225 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:24,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-06 22:24:24,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-06 22:24:24,426 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:24,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:24,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1188026188, now seen corresponding path program 8 times [2021-12-06 22:24:24,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:24,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873841298] [2021-12-06 22:24:24,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:24,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 65 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:24,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:24,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873841298] [2021-12-06 22:24:24,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873841298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:24,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917118419] [2021-12-06 22:24:24,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:24:24,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:24,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:24,605 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:24,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 22:24:24,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:24:24,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:24:24,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 22:24:24,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:24,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:25,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 22:24:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:25,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917118419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:25,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:25,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2021-12-06 22:24:25,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203855795] [2021-12-06 22:24:25,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:25,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 22:24:25,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:25,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 22:24:25,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-12-06 22:24:25,122 INFO L87 Difference]: Start difference. First operand 524 states and 592 transitions. Second operand has 32 states, 31 states have (on average 4.483870967741935) internal successors, (139), 32 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:25,713 INFO L93 Difference]: Finished difference Result 728 states and 812 transitions. [2021-12-06 22:24:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 22:24:25,714 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.483870967741935) internal successors, (139), 32 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-06 22:24:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:25,716 INFO L225 Difference]: With dead ends: 728 [2021-12-06 22:24:25,716 INFO L226 Difference]: Without dead ends: 728 [2021-12-06 22:24:25,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=430, Invalid=1732, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 22:24:25,717 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 826 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:25,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1891 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:24:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-12-06 22:24:25,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 610. [2021-12-06 22:24:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 606 states have (on average 1.141914191419142) internal successors, (692), 609 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 692 transitions. [2021-12-06 22:24:25,724 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 692 transitions. Word has length 69 [2021-12-06 22:24:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:25,724 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 692 transitions. [2021-12-06 22:24:25,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.483870967741935) internal successors, (139), 32 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 692 transitions. [2021-12-06 22:24:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 22:24:25,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:25,725 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:25,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 22:24:25,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:25,926 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:25,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1119450658, now seen corresponding path program 1 times [2021-12-06 22:24:25,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:25,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650773537] [2021-12-06 22:24:25,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:25,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 22:24:26,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:26,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650773537] [2021-12-06 22:24:26,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650773537] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:26,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799906875] [2021-12-06 22:24:26,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:26,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:26,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:26,063 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:26,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 22:24:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:26,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 22:24:26,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:26,149 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:24:26,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:24:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 22:24:26,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 22:24:26,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799906875] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:26,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:26,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2021-12-06 22:24:26,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253095623] [2021-12-06 22:24:26,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:26,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 22:24:26,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:26,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 22:24:26,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 22:24:26,745 INFO L87 Difference]: Start difference. First operand 610 states and 692 transitions. Second operand has 36 states, 35 states have (on average 4.828571428571428) internal successors, (169), 36 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:27,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:27,278 INFO L93 Difference]: Finished difference Result 1340 states and 1505 transitions. [2021-12-06 22:24:27,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 22:24:27,279 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.828571428571428) internal successors, (169), 36 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-06 22:24:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:27,283 INFO L225 Difference]: With dead ends: 1340 [2021-12-06 22:24:27,283 INFO L226 Difference]: Without dead ends: 1340 [2021-12-06 22:24:27,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=671, Invalid=2085, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 22:24:27,284 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 657 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:27,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [657 Valid, 763 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:24:27,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-12-06 22:24:27,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1035. [2021-12-06 22:24:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1031 states have (on average 1.148399612027158) internal successors, (1184), 1034 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1184 transitions. [2021-12-06 22:24:27,297 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1184 transitions. Word has length 71 [2021-12-06 22:24:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:27,297 INFO L470 AbstractCegarLoop]: Abstraction has 1035 states and 1184 transitions. [2021-12-06 22:24:27,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.828571428571428) internal successors, (169), 36 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:27,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1184 transitions. [2021-12-06 22:24:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 22:24:27,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:27,299 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:27,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 22:24:27,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:27,500 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:27,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:27,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1419954798, now seen corresponding path program 1 times [2021-12-06 22:24:27,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:27,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216651399] [2021-12-06 22:24:27,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:27,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:24:27,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:27,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216651399] [2021-12-06 22:24:27,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216651399] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:27,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609864391] [2021-12-06 22:24:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:27,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:27,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:27,706 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:27,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 22:24:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:27,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 22:24:27,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:27,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:24:27,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:24:27,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:24:28,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:24:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:24:28,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:28,186 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1436 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1436) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0)) is different from false [2021-12-06 22:24:28,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:28,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:24:28,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:28,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:24:28,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:24:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:24:28,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609864391] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:28,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:28,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 30 [2021-12-06 22:24:28,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632634768] [2021-12-06 22:24:28,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:28,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 22:24:28,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:28,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 22:24:28,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=726, Unknown=1, NotChecked=54, Total=870 [2021-12-06 22:24:28,355 INFO L87 Difference]: Start difference. First operand 1035 states and 1184 transitions. Second operand has 30 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 30 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:28,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:28,696 INFO L93 Difference]: Finished difference Result 1016 states and 1154 transitions. [2021-12-06 22:24:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 22:24:28,696 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 30 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-06 22:24:28,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:28,699 INFO L225 Difference]: With dead ends: 1016 [2021-12-06 22:24:28,699 INFO L226 Difference]: Without dead ends: 937 [2021-12-06 22:24:28,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=1601, Unknown=1, NotChecked=82, Total=1892 [2021-12-06 22:24:28,699 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 145 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:28,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 730 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 481 Invalid, 0 Unknown, 103 Unchecked, 0.1s Time] [2021-12-06 22:24:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-12-06 22:24:28,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 934. [2021-12-06 22:24:28,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 930 states have (on average 1.1526881720430107) internal successors, (1072), 933 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:28,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1072 transitions. [2021-12-06 22:24:28,708 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1072 transitions. Word has length 74 [2021-12-06 22:24:28,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:28,709 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1072 transitions. [2021-12-06 22:24:28,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 30 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:28,709 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1072 transitions. [2021-12-06 22:24:28,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 22:24:28,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:28,710 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:28,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 22:24:28,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:28,910 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:28,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:28,911 INFO L85 PathProgramCache]: Analyzing trace with hash 136339069, now seen corresponding path program 9 times [2021-12-06 22:24:28,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:28,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405741462] [2021-12-06 22:24:28,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:28,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:29,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:29,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405741462] [2021-12-06 22:24:29,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405741462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:29,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253986249] [2021-12-06 22:24:29,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:24:29,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:29,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:29,310 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:29,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 22:24:29,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 22:24:29,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:24:29,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 22:24:29,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:29,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:24:29,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:24:29,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:24:29,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:24:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:29,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:29,923 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1486 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1486) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0)) is different from false [2021-12-06 22:24:29,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:29,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:24:29,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:29,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:24:29,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:24:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:30,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253986249] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:30,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:30,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 20] total 40 [2021-12-06 22:24:30,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268182886] [2021-12-06 22:24:30,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:30,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 22:24:30,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:30,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 22:24:30,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1388, Unknown=1, NotChecked=74, Total=1560 [2021-12-06 22:24:30,135 INFO L87 Difference]: Start difference. First operand 934 states and 1072 transitions. Second operand has 40 states, 40 states have (on average 3.275) internal successors, (131), 40 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:31,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:31,571 INFO L93 Difference]: Finished difference Result 1717 states and 1964 transitions. [2021-12-06 22:24:31,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 22:24:31,571 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.275) internal successors, (131), 40 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-06 22:24:31,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:31,576 INFO L225 Difference]: With dead ends: 1717 [2021-12-06 22:24:31,576 INFO L226 Difference]: Without dead ends: 1644 [2021-12-06 22:24:31,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 130 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=433, Invalid=3992, Unknown=1, NotChecked=130, Total=4556 [2021-12-06 22:24:31,577 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 1283 mSDsluCounter, 3998 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 4166 SdHoareTripleChecker+Invalid, 2850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 501 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:31,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1283 Valid, 4166 Invalid, 2850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2291 Invalid, 0 Unknown, 501 Unchecked, 0.6s Time] [2021-12-06 22:24:31,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-12-06 22:24:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1315. [2021-12-06 22:24:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 1311 states have (on average 1.15255530129672) internal successors, (1511), 1314 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1511 transitions. [2021-12-06 22:24:31,590 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1511 transitions. Word has length 74 [2021-12-06 22:24:31,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:31,590 INFO L470 AbstractCegarLoop]: Abstraction has 1315 states and 1511 transitions. [2021-12-06 22:24:31,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.275) internal successors, (131), 40 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:31,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1511 transitions. [2021-12-06 22:24:31,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 22:24:31,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:31,592 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:31,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-06 22:24:31,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:31,792 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:31,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:31,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1093789664, now seen corresponding path program 1 times [2021-12-06 22:24:31,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:31,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349878601] [2021-12-06 22:24:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:31,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 22:24:31,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:31,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349878601] [2021-12-06 22:24:31,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349878601] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:31,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517530117] [2021-12-06 22:24:31,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:31,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:31,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:31,933 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:31,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 22:24:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:32,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 22:24:32,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:32,041 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:24:32,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:24:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 22:24:32,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 22:24:32,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517530117] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:32,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:32,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2021-12-06 22:24:32,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836966405] [2021-12-06 22:24:32,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:32,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 22:24:32,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:32,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 22:24:32,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 22:24:32,774 INFO L87 Difference]: Start difference. First operand 1315 states and 1511 transitions. Second operand has 38 states, 37 states have (on average 4.891891891891892) internal successors, (181), 38 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:33,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:33,649 INFO L93 Difference]: Finished difference Result 2028 states and 2280 transitions. [2021-12-06 22:24:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:24:33,649 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.891891891891892) internal successors, (181), 38 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-06 22:24:33,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:33,656 INFO L225 Difference]: With dead ends: 2028 [2021-12-06 22:24:33,656 INFO L226 Difference]: Without dead ends: 2019 [2021-12-06 22:24:33,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=852, Invalid=2808, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 22:24:33,657 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1402 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1402 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:33,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1402 Valid, 943 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:24:33,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-12-06 22:24:33,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1328. [2021-12-06 22:24:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1324 states have (on average 1.161631419939577) internal successors, (1538), 1327 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:33,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 1538 transitions. [2021-12-06 22:24:33,674 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 1538 transitions. Word has length 75 [2021-12-06 22:24:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:33,674 INFO L470 AbstractCegarLoop]: Abstraction has 1328 states and 1538 transitions. [2021-12-06 22:24:33,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.891891891891892) internal successors, (181), 38 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 1538 transitions. [2021-12-06 22:24:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 22:24:33,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:33,675 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:33,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 22:24:33,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-12-06 22:24:33,876 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:33,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:33,877 INFO L85 PathProgramCache]: Analyzing trace with hash -839159297, now seen corresponding path program 3 times [2021-12-06 22:24:33,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:33,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690979941] [2021-12-06 22:24:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:33,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-06 22:24:34,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:34,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690979941] [2021-12-06 22:24:34,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690979941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:34,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538578394] [2021-12-06 22:24:34,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:24:34,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:34,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:34,004 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:34,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 22:24:34,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 22:24:34,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:24:34,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 22:24:34,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:34,122 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:24:34,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:24:34,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:24:34,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:24:34,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:24:34,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:34,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 22:24:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-06 22:24:34,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:35,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:35,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-06 22:24:35,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:35,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 22:24:35,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 22:24:35,660 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-06 22:24:35,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538578394] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:35,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:35,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2021-12-06 22:24:35,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890023777] [2021-12-06 22:24:35,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:35,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 22:24:35,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:35,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 22:24:35,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=576, Unknown=8, NotChecked=0, Total=650 [2021-12-06 22:24:35,661 INFO L87 Difference]: Start difference. First operand 1328 states and 1538 transitions. Second operand has 26 states, 26 states have (on average 5.730769230769231) internal successors, (149), 26 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:36,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:36,040 INFO L93 Difference]: Finished difference Result 1903 states and 2170 transitions. [2021-12-06 22:24:36,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 22:24:36,040 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.730769230769231) internal successors, (149), 26 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-06 22:24:36,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:36,046 INFO L225 Difference]: With dead ends: 1903 [2021-12-06 22:24:36,046 INFO L226 Difference]: Without dead ends: 1829 [2021-12-06 22:24:36,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=1600, Unknown=8, NotChecked=0, Total=1806 [2021-12-06 22:24:36,047 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:36,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 717 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 89 Unchecked, 0.0s Time] [2021-12-06 22:24:36,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-12-06 22:24:36,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1731. [2021-12-06 22:24:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1727 states have (on average 1.1563404748118125) internal successors, (1997), 1730 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 1997 transitions. [2021-12-06 22:24:36,063 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 1997 transitions. Word has length 77 [2021-12-06 22:24:36,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:36,063 INFO L470 AbstractCegarLoop]: Abstraction has 1731 states and 1997 transitions. [2021-12-06 22:24:36,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.730769230769231) internal successors, (149), 26 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 1997 transitions. [2021-12-06 22:24:36,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 22:24:36,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:36,065 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:36,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 22:24:36,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:36,266 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:36,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:36,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1083596167, now seen corresponding path program 3 times [2021-12-06 22:24:36,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:36,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130269674] [2021-12-06 22:24:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:36,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 18 proven. 57 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:36,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:36,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130269674] [2021-12-06 22:24:36,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130269674] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:36,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286257410] [2021-12-06 22:24:36,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:24:36,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:36,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:36,427 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:36,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 22:24:36,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 22:24:36,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:24:36,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-06 22:24:36,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:36,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:24:36,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:24:36,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-06 22:24:36,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-06 22:24:37,648 INFO L354 Elim1Store]: treesize reduction 50, result has 33.3 percent of original size [2021-12-06 22:24:37,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 38 [2021-12-06 22:24:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:24:37,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:39,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:39,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2021-12-06 22:24:39,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:39,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 81 [2021-12-06 22:24:39,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:39,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 55 [2021-12-06 22:24:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:24:40,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286257410] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:40,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:40,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 24, 25] total 61 [2021-12-06 22:24:40,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624166984] [2021-12-06 22:24:40,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:40,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-06 22:24:40,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:40,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-06 22:24:40,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=3423, Unknown=1, NotChecked=0, Total=3782 [2021-12-06 22:24:40,747 INFO L87 Difference]: Start difference. First operand 1731 states and 1997 transitions. Second operand has 62 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 62 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:44,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:44,844 INFO L93 Difference]: Finished difference Result 2053 states and 2322 transitions. [2021-12-06 22:24:44,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-12-06 22:24:44,844 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 62 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-06 22:24:44,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:44,851 INFO L225 Difference]: With dead ends: 2053 [2021-12-06 22:24:44,851 INFO L226 Difference]: Without dead ends: 2032 [2021-12-06 22:24:44,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4904 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1950, Invalid=18922, Unknown=8, NotChecked=0, Total=20880 [2021-12-06 22:24:44,852 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 357 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 1584 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 795 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:44,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 1584 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 543 Invalid, 0 Unknown, 795 Unchecked, 0.2s Time] [2021-12-06 22:24:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-12-06 22:24:44,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1702. [2021-12-06 22:24:44,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1698 states have (on average 1.1531213191990577) internal successors, (1958), 1701 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 1958 transitions. [2021-12-06 22:24:44,869 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 1958 transitions. Word has length 77 [2021-12-06 22:24:44,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:44,869 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 1958 transitions. [2021-12-06 22:24:44,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 62 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:44,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 1958 transitions. [2021-12-06 22:24:44,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-06 22:24:44,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:44,871 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:44,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 22:24:45,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:45,071 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:45,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:45,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1542070618, now seen corresponding path program 10 times [2021-12-06 22:24:45,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:45,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553060531] [2021-12-06 22:24:45,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:45,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:45,222 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 32 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:45,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:45,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553060531] [2021-12-06 22:24:45,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553060531] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:45,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24072613] [2021-12-06 22:24:45,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:24:45,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:45,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:45,223 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:45,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 22:24:45,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:24:45,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:24:45,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 22:24:45,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:45,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:45,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 22:24:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:45,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24072613] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:45,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:45,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-06 22:24:45,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011216950] [2021-12-06 22:24:45,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:45,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 22:24:45,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:45,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 22:24:45,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 22:24:45,824 INFO L87 Difference]: Start difference. First operand 1702 states and 1958 transitions. Second operand has 35 states, 34 states have (on average 4.911764705882353) internal successors, (167), 35 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:46,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:46,535 INFO L93 Difference]: Finished difference Result 2223 states and 2554 transitions. [2021-12-06 22:24:46,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 22:24:46,535 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.911764705882353) internal successors, (167), 35 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-06 22:24:46,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:46,542 INFO L225 Difference]: With dead ends: 2223 [2021-12-06 22:24:46,542 INFO L226 Difference]: Without dead ends: 2223 [2021-12-06 22:24:46,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=521, Invalid=2131, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 22:24:46,542 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 923 mSDsluCounter, 2167 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 2370 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:46,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 2370 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:24:46,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-12-06 22:24:46,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1867. [2021-12-06 22:24:46,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1863 states have (on average 1.156736446591519) internal successors, (2155), 1866 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2155 transitions. [2021-12-06 22:24:46,564 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2155 transitions. Word has length 78 [2021-12-06 22:24:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:46,564 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 2155 transitions. [2021-12-06 22:24:46,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.911764705882353) internal successors, (167), 35 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2155 transitions. [2021-12-06 22:24:46,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 22:24:46,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:46,565 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:46,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-06 22:24:46,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-06 22:24:46,766 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:46,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:46,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1380221382, now seen corresponding path program 1 times [2021-12-06 22:24:46,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:46,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406708981] [2021-12-06 22:24:46,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:46,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:46,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:46,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406708981] [2021-12-06 22:24:46,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406708981] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:46,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040124862] [2021-12-06 22:24:46,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:46,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:46,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:46,881 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:46,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 22:24:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:46,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 22:24:46,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:47,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:47,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 22:24:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:47,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040124862] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:47,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:47,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2021-12-06 22:24:47,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829543951] [2021-12-06 22:24:47,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:47,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 22:24:47,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:47,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 22:24:47,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-12-06 22:24:47,390 INFO L87 Difference]: Start difference. First operand 1867 states and 2155 transitions. Second operand has 27 states, 26 states have (on average 6.346153846153846) internal successors, (165), 27 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:47,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:47,794 INFO L93 Difference]: Finished difference Result 2227 states and 2549 transitions. [2021-12-06 22:24:47,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 22:24:47,795 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 6.346153846153846) internal successors, (165), 27 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 22:24:47,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:47,802 INFO L225 Difference]: With dead ends: 2227 [2021-12-06 22:24:47,802 INFO L226 Difference]: Without dead ends: 2227 [2021-12-06 22:24:47,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 22:24:47,802 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 701 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:47,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 853 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:24:47,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2021-12-06 22:24:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 1949. [2021-12-06 22:24:47,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1945 states have (on average 1.1573264781491002) internal successors, (2251), 1948 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:47,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 2251 transitions. [2021-12-06 22:24:47,820 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 2251 transitions. Word has length 81 [2021-12-06 22:24:47,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:47,820 INFO L470 AbstractCegarLoop]: Abstraction has 1949 states and 2251 transitions. [2021-12-06 22:24:47,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 6.346153846153846) internal successors, (165), 27 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:47,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 2251 transitions. [2021-12-06 22:24:47,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 22:24:47,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:47,821 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:47,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 22:24:48,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:48,022 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:48,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:48,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1908944175, now seen corresponding path program 11 times [2021-12-06 22:24:48,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:48,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227312235] [2021-12-06 22:24:48,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:48,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:48,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:48,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227312235] [2021-12-06 22:24:48,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227312235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:48,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259085858] [2021-12-06 22:24:48,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:24:48,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:48,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:48,304 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:48,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 22:24:48,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 22:24:48,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:24:48,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-06 22:24:48,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:48,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:24:48,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:24:48,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:24:48,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:24:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:48,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:48,926 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1793 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1793) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0)) is different from false [2021-12-06 22:24:48,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:48,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:24:48,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:48,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:24:48,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:24:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:49,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259085858] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:49,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:49,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 39 [2021-12-06 22:24:49,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884635858] [2021-12-06 22:24:49,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:49,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 22:24:49,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:49,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 22:24:49,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1299, Unknown=1, NotChecked=72, Total=1482 [2021-12-06 22:24:49,121 INFO L87 Difference]: Start difference. First operand 1949 states and 2251 transitions. Second operand has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:50,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:50,129 INFO L93 Difference]: Finished difference Result 3042 states and 3498 transitions. [2021-12-06 22:24:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 22:24:50,129 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 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 83 [2021-12-06 22:24:50,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:50,141 INFO L225 Difference]: With dead ends: 3042 [2021-12-06 22:24:50,141 INFO L226 Difference]: Without dead ends: 2935 [2021-12-06 22:24:50,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=3267, Unknown=1, NotChecked=116, Total=3660 [2021-12-06 22:24:50,141 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 628 mSDsluCounter, 4917 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 5153 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:50,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 5153 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2310 Invalid, 0 Unknown, 259 Unchecked, 0.6s Time] [2021-12-06 22:24:50,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2021-12-06 22:24:50,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 2450. [2021-12-06 22:24:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2450 states, 2446 states have (on average 1.1578086672117742) internal successors, (2832), 2449 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 2832 transitions. [2021-12-06 22:24:50,167 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 2832 transitions. Word has length 83 [2021-12-06 22:24:50,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:50,167 INFO L470 AbstractCegarLoop]: Abstraction has 2450 states and 2832 transitions. [2021-12-06 22:24:50,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:50,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 2832 transitions. [2021-12-06 22:24:50,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 22:24:50,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:50,169 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:50,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-06 22:24:50,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:50,369 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:50,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:50,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1953180259, now seen corresponding path program 1 times [2021-12-06 22:24:50,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:50,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695494577] [2021-12-06 22:24:50,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:50,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:50,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:50,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695494577] [2021-12-06 22:24:50,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695494577] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:50,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725331809] [2021-12-06 22:24:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:50,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:50,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:50,516 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:50,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 22:24:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:50,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 22:24:50,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:50,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:24:50,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:24:50,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:24:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:50,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:51,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725331809] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:51,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:51,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2021-12-06 22:24:51,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741903324] [2021-12-06 22:24:51,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:51,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 22:24:51,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:51,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 22:24:51,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 22:24:51,324 INFO L87 Difference]: Start difference. First operand 2450 states and 2832 transitions. Second operand has 35 states, 34 states have (on average 6.382352941176471) internal successors, (217), 35 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:52,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:52,052 INFO L93 Difference]: Finished difference Result 3045 states and 3468 transitions. [2021-12-06 22:24:52,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 22:24:52,053 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 6.382352941176471) internal successors, (217), 35 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-06 22:24:52,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:52,060 INFO L225 Difference]: With dead ends: 3045 [2021-12-06 22:24:52,060 INFO L226 Difference]: Without dead ends: 3045 [2021-12-06 22:24:52,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=594, Invalid=2376, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 22:24:52,060 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 826 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:52,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 916 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:24:52,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-12-06 22:24:52,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 2450. [2021-12-06 22:24:52,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2450 states, 2446 states have (on average 1.1545380212591987) internal successors, (2824), 2449 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 2824 transitions. [2021-12-06 22:24:52,082 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 2824 transitions. Word has length 84 [2021-12-06 22:24:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:52,082 INFO L470 AbstractCegarLoop]: Abstraction has 2450 states and 2824 transitions. [2021-12-06 22:24:52,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 6.382352941176471) internal successors, (217), 35 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 2824 transitions. [2021-12-06 22:24:52,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 22:24:52,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:52,086 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:52,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-06 22:24:52,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-06 22:24:52,287 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:52,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:52,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1865342839, now seen corresponding path program 2 times [2021-12-06 22:24:52,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:52,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671072016] [2021-12-06 22:24:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:52,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 11 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:24:52,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:52,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671072016] [2021-12-06 22:24:52,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671072016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:52,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494842721] [2021-12-06 22:24:52,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:24:52,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:52,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:52,800 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:52,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 22:24:52,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:24:52,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:24:52,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 22:24:52,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:52,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:24:53,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:24:53,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:24:53,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:24:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 11 proven. 56 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:53,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:53,432 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1893 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1893) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0)) is different from false [2021-12-06 22:24:53,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:53,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:24:53,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:24:53,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:24:53,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:24:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 11 proven. 56 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:24:53,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494842721] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:53,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:53,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 18] total 40 [2021-12-06 22:24:53,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962100745] [2021-12-06 22:24:53,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:53,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 22:24:53,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:53,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 22:24:53,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1369, Unknown=1, NotChecked=74, Total=1560 [2021-12-06 22:24:53,660 INFO L87 Difference]: Start difference. First operand 2450 states and 2824 transitions. Second operand has 40 states, 40 states have (on average 3.55) internal successors, (142), 40 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:54,970 INFO L93 Difference]: Finished difference Result 2618 states and 3004 transitions. [2021-12-06 22:24:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 22:24:54,971 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.55) internal successors, (142), 40 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-06 22:24:54,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:54,974 INFO L225 Difference]: With dead ends: 2618 [2021-12-06 22:24:54,974 INFO L226 Difference]: Without dead ends: 2559 [2021-12-06 22:24:54,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=463, Invalid=3572, Unknown=1, NotChecked=124, Total=4160 [2021-12-06 22:24:54,974 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 1338 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1338 SdHoareTripleChecker+Valid, 2071 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:54,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1338 Valid, 2071 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1344 Invalid, 0 Unknown, 309 Unchecked, 0.5s Time] [2021-12-06 22:24:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2021-12-06 22:24:54,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 2397. [2021-12-06 22:24:54,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 2393 states have (on average 1.15545340576682) internal successors, (2765), 2396 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:54,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 2765 transitions. [2021-12-06 22:24:54,994 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 2765 transitions. Word has length 85 [2021-12-06 22:24:54,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:54,995 INFO L470 AbstractCegarLoop]: Abstraction has 2397 states and 2765 transitions. [2021-12-06 22:24:54,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.55) internal successors, (142), 40 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:54,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 2765 transitions. [2021-12-06 22:24:54,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 22:24:54,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:54,996 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:55,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-06 22:24:55,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-06 22:24:55,197 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:55,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:55,197 INFO L85 PathProgramCache]: Analyzing trace with hash -616606990, now seen corresponding path program 12 times [2021-12-06 22:24:55,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:55,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378443437] [2021-12-06 22:24:55,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:55,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 50 proven. 128 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:55,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:55,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378443437] [2021-12-06 22:24:55,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378443437] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:55,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106003863] [2021-12-06 22:24:55,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:24:55,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:55,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:55,358 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:55,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 22:24:55,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 22:24:55,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:24:55,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 22:24:55,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 72 proven. 106 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:55,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:24:56,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 22:24:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 72 proven. 106 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:24:56,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106003863] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:24:56,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:24:56,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2021-12-06 22:24:56,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042027551] [2021-12-06 22:24:56,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:24:56,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 22:24:56,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:24:56,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 22:24:56,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1779, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 22:24:56,102 INFO L87 Difference]: Start difference. First operand 2397 states and 2765 transitions. Second operand has 46 states, 45 states have (on average 4.777777777777778) internal successors, (215), 46 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:56,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:24:56,815 INFO L93 Difference]: Finished difference Result 2902 states and 3313 transitions. [2021-12-06 22:24:56,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:24:56,815 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 4.777777777777778) internal successors, (215), 46 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-06 22:24:56,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:24:56,818 INFO L225 Difference]: With dead ends: 2902 [2021-12-06 22:24:56,818 INFO L226 Difference]: Without dead ends: 2902 [2021-12-06 22:24:56,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=842, Invalid=3448, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 22:24:56,819 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 1382 mSDsluCounter, 1955 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1382 SdHoareTripleChecker+Valid, 2218 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:24:56,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1382 Valid, 2218 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:24:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2902 states. [2021-12-06 22:24:56,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2902 to 2556. [2021-12-06 22:24:56,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2552 states have (on average 1.158307210031348) internal successors, (2956), 2555 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:56,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 2956 transitions. [2021-12-06 22:24:56,838 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 2956 transitions. Word has length 87 [2021-12-06 22:24:56,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:24:56,838 INFO L470 AbstractCegarLoop]: Abstraction has 2556 states and 2956 transitions. [2021-12-06 22:24:56,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 4.777777777777778) internal successors, (215), 46 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:24:56,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 2956 transitions. [2021-12-06 22:24:56,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 22:24:56,840 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:24:56,840 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:24:56,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-06 22:24:57,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:57,041 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:24:57,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:24:57,043 INFO L85 PathProgramCache]: Analyzing trace with hash 258190664, now seen corresponding path program 1 times [2021-12-06 22:24:57,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:24:57,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137917675] [2021-12-06 22:24:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:57,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:24:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 22:24:57,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:24:57,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137917675] [2021-12-06 22:24:57,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137917675] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:24:57,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598566989] [2021-12-06 22:24:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:24:57,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:24:57,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:24:57,147 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:24:57,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 22:24:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:24:57,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 151 conjunts are in the unsatisfiable core [2021-12-06 22:24:57,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:24:57,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:24:57,582 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:24:57,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-06 22:24:57,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2021-12-06 22:24:59,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:24:59,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:24:59,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:24:59,118 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 22:24:59,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 28 [2021-12-06 22:24:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:24:59,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:25:00,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:00,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 41 [2021-12-06 22:25:00,069 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-06 22:25:00,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 70 [2021-12-06 22:25:00,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:25:00,089 INFO L354 Elim1Store]: treesize reduction 22, result has 63.9 percent of original size [2021-12-06 22:25:00,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 71 [2021-12-06 22:25:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:25:00,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598566989] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:25:00,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:25:00,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 35, 32] total 72 [2021-12-06 22:25:00,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202072218] [2021-12-06 22:25:00,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:25:00,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 22:25:00,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:00,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 22:25:00,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=4829, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 22:25:00,881 INFO L87 Difference]: Start difference. First operand 2556 states and 2956 transitions. Second operand has 72 states, 72 states have (on average 3.0416666666666665) internal successors, (219), 72 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:04,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:04,006 INFO L93 Difference]: Finished difference Result 2826 states and 3166 transitions. [2021-12-06 22:25:04,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-06 22:25:04,007 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.0416666666666665) internal successors, (219), 72 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 89 [2021-12-06 22:25:04,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:04,009 INFO L225 Difference]: With dead ends: 2826 [2021-12-06 22:25:04,009 INFO L226 Difference]: Without dead ends: 2564 [2021-12-06 22:25:04,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3440 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=792, Invalid=13969, Unknown=1, NotChecked=0, Total=14762 [2021-12-06 22:25:04,010 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 191 mSDsluCounter, 2140 mSDsCounter, 0 mSdLazyCounter, 1826 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 2197 SdHoareTripleChecker+Invalid, 2347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:04,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 2197 Invalid, 2347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1826 Invalid, 0 Unknown, 474 Unchecked, 0.6s Time] [2021-12-06 22:25:04,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2021-12-06 22:25:04,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 2116. [2021-12-06 22:25:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2112 states have (on average 1.1482007575757576) internal successors, (2425), 2115 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 2425 transitions. [2021-12-06 22:25:04,028 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 2425 transitions. Word has length 89 [2021-12-06 22:25:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:04,028 INFO L470 AbstractCegarLoop]: Abstraction has 2116 states and 2425 transitions. [2021-12-06 22:25:04,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.0416666666666665) internal successors, (219), 72 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 2425 transitions. [2021-12-06 22:25:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 22:25:04,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:04,029 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:25:04,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-06 22:25:04,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-12-06 22:25:04,230 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:25:04,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:04,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1063827690, now seen corresponding path program 2 times [2021-12-06 22:25:04,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:04,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216236140] [2021-12-06 22:25:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:04,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 22:25:04,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:04,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216236140] [2021-12-06 22:25:04,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216236140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:04,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284672266] [2021-12-06 22:25:04,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:25:04,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:04,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:04,342 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:04,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 22:25:04,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:25:04,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:25:04,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-06 22:25:04,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:04,463 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:25:04,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:25:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 22:25:04,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:25:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 22:25:04,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284672266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:25:04,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:25:04,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2021-12-06 22:25:04,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631104569] [2021-12-06 22:25:04,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:25:04,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 22:25:04,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:04,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 22:25:04,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 22:25:04,892 INFO L87 Difference]: Start difference. First operand 2116 states and 2425 transitions. Second operand has 35 states, 35 states have (on average 3.7142857142857144) internal successors, (130), 35 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) [2021-12-06 22:25:05,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:05,422 INFO L93 Difference]: Finished difference Result 3903 states and 4423 transitions. [2021-12-06 22:25:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 22:25:05,422 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.7142857142857144) internal successors, (130), 35 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) Word has length 90 [2021-12-06 22:25:05,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:05,426 INFO L225 Difference]: With dead ends: 3903 [2021-12-06 22:25:05,426 INFO L226 Difference]: Without dead ends: 3879 [2021-12-06 22:25:05,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=2159, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 22:25:05,427 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1562 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:05,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1562 Valid, 701 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:25:05,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2021-12-06 22:25:05,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 2192. [2021-12-06 22:25:05,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2188 states have (on average 1.146709323583181) internal successors, (2509), 2191 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:05,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 2509 transitions. [2021-12-06 22:25:05,448 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 2509 transitions. Word has length 90 [2021-12-06 22:25:05,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:05,448 INFO L470 AbstractCegarLoop]: Abstraction has 2192 states and 2509 transitions. [2021-12-06 22:25:05,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.7142857142857144) internal successors, (130), 35 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) [2021-12-06 22:25:05,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 2509 transitions. [2021-12-06 22:25:05,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 22:25:05,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:05,450 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:25:05,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-06 22:25:05,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:05,651 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:25:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:05,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1761619874, now seen corresponding path program 2 times [2021-12-06 22:25:05,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:05,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635826125] [2021-12-06 22:25:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:05,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 61 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:25:05,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:05,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635826125] [2021-12-06 22:25:05,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635826125] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:05,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659461990] [2021-12-06 22:25:05,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:25:05,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:05,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:05,816 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:05,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 22:25:05,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:25:05,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:25:05,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 22:25:05,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:05,931 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:25:05,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:25:06,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 22:25:06,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:06,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-12-06 22:25:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 51 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:25:07,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:25:07,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-12-06 22:25:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:25:08,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659461990] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:25:08,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:25:08,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 46 [2021-12-06 22:25:08,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179932641] [2021-12-06 22:25:08,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:25:08,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 22:25:08,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:08,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 22:25:08,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1937, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 22:25:08,488 INFO L87 Difference]: Start difference. First operand 2192 states and 2509 transitions. Second operand has 47 states, 46 states have (on average 5.108695652173913) internal successors, (235), 47 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:09,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:09,384 INFO L93 Difference]: Finished difference Result 2360 states and 2689 transitions. [2021-12-06 22:25:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 22:25:09,384 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 5.108695652173913) internal successors, (235), 47 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-12-06 22:25:09,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:09,386 INFO L225 Difference]: With dead ends: 2360 [2021-12-06 22:25:09,387 INFO L226 Difference]: Without dead ends: 2352 [2021-12-06 22:25:09,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 151 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=551, Invalid=3871, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 22:25:09,387 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 412 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:09,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 1133 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 427 Invalid, 0 Unknown, 258 Unchecked, 0.1s Time] [2021-12-06 22:25:09,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-12-06 22:25:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 2261. [2021-12-06 22:25:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 2257 states have (on average 1.1462117855560479) internal successors, (2587), 2260 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 2587 transitions. [2021-12-06 22:25:09,413 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 2587 transitions. Word has length 90 [2021-12-06 22:25:09,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:09,413 INFO L470 AbstractCegarLoop]: Abstraction has 2261 states and 2587 transitions. [2021-12-06 22:25:09,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 5.108695652173913) internal successors, (235), 47 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:09,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 2587 transitions. [2021-12-06 22:25:09,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 22:25:09,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:09,415 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:25:09,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 22:25:09,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:09,616 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:25:09,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:09,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1236220834, now seen corresponding path program 3 times [2021-12-06 22:25:09,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:09,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088089162] [2021-12-06 22:25:09,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:09,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 61 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:25:09,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:09,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088089162] [2021-12-06 22:25:09,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088089162] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:09,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140253234] [2021-12-06 22:25:09,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:25:09,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:09,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:09,741 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:09,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-06 22:25:09,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 22:25:09,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:25:09,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 22:25:09,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:09,868 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:25:09,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:25:10,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:25:10,148 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-12-06 22:25:10,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 22:25:10,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:10,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 22:25:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 22:25:10,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:25:10,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2021-12-06 22:25:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-06 22:25:12,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140253234] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:25:12,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:25:12,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 35 [2021-12-06 22:25:12,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677100782] [2021-12-06 22:25:12,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:25:12,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 22:25:12,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:12,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 22:25:12,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 22:25:12,016 INFO L87 Difference]: Start difference. First operand 2261 states and 2587 transitions. Second operand has 36 states, 35 states have (on average 5.4) internal successors, (189), 36 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:14,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:14,723 INFO L93 Difference]: Finished difference Result 3218 states and 3619 transitions. [2021-12-06 22:25:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-06 22:25:14,723 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 5.4) internal successors, (189), 36 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-12-06 22:25:14,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:14,726 INFO L225 Difference]: With dead ends: 3218 [2021-12-06 22:25:14,726 INFO L226 Difference]: Without dead ends: 2988 [2021-12-06 22:25:14,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3919 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1850, Invalid=12192, Unknown=0, NotChecked=0, Total=14042 [2021-12-06 22:25:14,727 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 956 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 2141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:14,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [956 Valid, 1429 Invalid, 2141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1722 Invalid, 0 Unknown, 295 Unchecked, 0.6s Time] [2021-12-06 22:25:14,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2021-12-06 22:25:14,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2137. [2021-12-06 22:25:14,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2133 states have (on average 1.1420534458509142) internal successors, (2436), 2136 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 2436 transitions. [2021-12-06 22:25:14,748 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 2436 transitions. Word has length 90 [2021-12-06 22:25:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:14,748 INFO L470 AbstractCegarLoop]: Abstraction has 2137 states and 2436 transitions. [2021-12-06 22:25:14,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 5.4) internal successors, (189), 36 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:14,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 2436 transitions. [2021-12-06 22:25:14,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 22:25:14,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:14,750 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:25:14,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-06 22:25:14,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:14,950 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:25:14,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:14,951 INFO L85 PathProgramCache]: Analyzing trace with hash -529909097, now seen corresponding path program 13 times [2021-12-06 22:25:14,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:14,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842641759] [2021-12-06 22:25:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:14,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:25:15,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:15,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842641759] [2021-12-06 22:25:15,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842641759] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:15,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043553384] [2021-12-06 22:25:15,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:25:15,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:15,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:15,287 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:15,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-06 22:25:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:15,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-06 22:25:15,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:15,406 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:25:15,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:25:15,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:25:15,826 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:25:15,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-06 22:25:15,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2021-12-06 22:25:16,778 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 22:25:16,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 22:25:17,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:25:17,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:17,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-06 22:25:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:25:17,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:25:17,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:17,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:25:17,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:17,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:25:17,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:25:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:25:18,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043553384] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:25:18,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:25:18,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 30, 30] total 71 [2021-12-06 22:25:18,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495886020] [2021-12-06 22:25:18,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:25:18,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 22:25:18,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:18,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 22:25:18,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=4742, Unknown=1, NotChecked=0, Total=4970 [2021-12-06 22:25:18,592 INFO L87 Difference]: Start difference. First operand 2137 states and 2436 transitions. Second operand has 71 states, 71 states have (on average 3.295774647887324) internal successors, (234), 71 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:21,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:21,091 INFO L93 Difference]: Finished difference Result 3280 states and 3688 transitions. [2021-12-06 22:25:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 22:25:21,091 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.295774647887324) internal successors, (234), 71 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-12-06 22:25:21,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:21,094 INFO L225 Difference]: With dead ends: 3280 [2021-12-06 22:25:21,095 INFO L226 Difference]: Without dead ends: 3178 [2021-12-06 22:25:21,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 143 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=527, Invalid=10392, Unknown=1, NotChecked=0, Total=10920 [2021-12-06 22:25:21,095 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 743 mSDsluCounter, 9342 mSDsCounter, 0 mSdLazyCounter, 3985 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 9568 SdHoareTripleChecker+Invalid, 6174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2167 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:21,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 9568 Invalid, 6174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3985 Invalid, 0 Unknown, 2167 Unchecked, 1.0s Time] [2021-12-06 22:25:21,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2021-12-06 22:25:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 2758. [2021-12-06 22:25:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2758 states, 2754 states have (on average 1.1412490922294845) internal successors, (3143), 2757 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2758 states to 2758 states and 3143 transitions. [2021-12-06 22:25:21,119 INFO L78 Accepts]: Start accepts. Automaton has 2758 states and 3143 transitions. Word has length 92 [2021-12-06 22:25:21,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:21,119 INFO L470 AbstractCegarLoop]: Abstraction has 2758 states and 3143 transitions. [2021-12-06 22:25:21,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.295774647887324) internal successors, (234), 71 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:21,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2758 states and 3143 transitions. [2021-12-06 22:25:21,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-06 22:25:21,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:21,121 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:25:21,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-06 22:25:21,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:21,322 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:25:21,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:21,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2084747641, now seen corresponding path program 3 times [2021-12-06 22:25:21,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:21,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574506370] [2021-12-06 22:25:21,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:21,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 22:25:21,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:21,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574506370] [2021-12-06 22:25:21,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574506370] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:21,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825522339] [2021-12-06 22:25:21,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:25:21,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:21,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:21,455 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:21,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 22:25:21,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 22:25:21,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:25:21,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 22:25:21,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:21,620 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:25:21,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:25:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 22:25:21,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:25:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 22:25:22,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825522339] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:25:22,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:25:22,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2021-12-06 22:25:22,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512145322] [2021-12-06 22:25:22,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:25:22,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 22:25:22,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:22,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 22:25:22,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 22:25:22,151 INFO L87 Difference]: Start difference. First operand 2758 states and 3143 transitions. Second operand has 34 states, 34 states have (on average 4.9411764705882355) internal successors, (168), 34 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:23,418 INFO L93 Difference]: Finished difference Result 6677 states and 7512 transitions. [2021-12-06 22:25:23,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 22:25:23,418 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.9411764705882355) internal successors, (168), 34 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have 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 [2021-12-06 22:25:23,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:23,422 INFO L225 Difference]: With dead ends: 6677 [2021-12-06 22:25:23,422 INFO L226 Difference]: Without dead ends: 6504 [2021-12-06 22:25:23,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=927, Invalid=4043, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 22:25:23,422 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 1238 mSDsluCounter, 1858 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:23,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1238 Valid, 1988 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:25:23,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6504 states. [2021-12-06 22:25:23,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6504 to 5290. [2021-12-06 22:25:23,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5290 states, 5286 states have (on average 1.1399924328414681) internal successors, (6026), 5289 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:23,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5290 states to 5290 states and 6026 transitions. [2021-12-06 22:25:23,471 INFO L78 Accepts]: Start accepts. Automaton has 5290 states and 6026 transitions. Word has length 94 [2021-12-06 22:25:23,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:23,472 INFO L470 AbstractCegarLoop]: Abstraction has 5290 states and 6026 transitions. [2021-12-06 22:25:23,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.9411764705882355) internal successors, (168), 34 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 5290 states and 6026 transitions. [2021-12-06 22:25:23,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 22:25:23,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:23,474 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:25:23,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-06 22:25:23,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:23,675 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:25:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:23,676 INFO L85 PathProgramCache]: Analyzing trace with hash 693578601, now seen corresponding path program 2 times [2021-12-06 22:25:23,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:23,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086128661] [2021-12-06 22:25:23,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:23,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:25:24,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:24,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086128661] [2021-12-06 22:25:24,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086128661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:24,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302970563] [2021-12-06 22:25:24,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:25:24,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:24,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:24,061 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:24,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-06 22:25:24,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:25:24,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:25:24,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 146 conjunts are in the unsatisfiable core [2021-12-06 22:25:24,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:24,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:25:24,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:25:24,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:25:25,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:25:25,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2021-12-06 22:25:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 22:25:25,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:25:26,204 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrstr_#t~post17#1.offset_265| Int) (v_ArrVal_2320 (Array Int Int))) (let ((.cse0 (select v_ArrVal_2320 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)))) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrstr_#t~post17#1.offset_265|) (not (= .cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2320) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |v_ULTIMATE.start_cstrstr_#t~post17#1.offset_265|)))) (= .cse0 0) (< |v_ULTIMATE.start_cstrstr_#t~post17#1.offset_265| 0)))) is different from false [2021-12-06 22:25:26,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:26,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-06 22:25:26,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:26,216 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 48 treesize of output 48 [2021-12-06 22:25:26,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:26,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2021-12-06 22:25:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-06 22:25:26,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302970563] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:25:26,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:25:26,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 23] total 66 [2021-12-06 22:25:26,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404377052] [2021-12-06 22:25:26,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:25:26,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-06 22:25:26,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:26,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-06 22:25:26,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=3951, Unknown=1, NotChecked=126, Total=4290 [2021-12-06 22:25:26,798 INFO L87 Difference]: Start difference. First operand 5290 states and 6026 transitions. Second operand has 66 states, 66 states have (on average 3.515151515151515) internal successors, (232), 66 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:27,545 INFO L93 Difference]: Finished difference Result 5392 states and 6128 transitions. [2021-12-06 22:25:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 22:25:27,546 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.515151515151515) internal successors, (232), 66 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-06 22:25:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:27,548 INFO L225 Difference]: With dead ends: 5392 [2021-12-06 22:25:27,548 INFO L226 Difference]: Without dead ends: 5327 [2021-12-06 22:25:27,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 150 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=335, Invalid=5830, Unknown=1, NotChecked=154, Total=6320 [2021-12-06 22:25:27,549 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 195 mSDsluCounter, 2611 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 2684 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:27,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 2684 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 826 Invalid, 0 Unknown, 422 Unchecked, 0.2s Time] [2021-12-06 22:25:27,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5327 states. [2021-12-06 22:25:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5327 to 5323. [2021-12-06 22:25:27,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5323 states, 5319 states have (on average 1.1391238954690732) internal successors, (6059), 5322 states have internal predecessors, (6059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:27,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5323 states to 5323 states and 6059 transitions. [2021-12-06 22:25:27,588 INFO L78 Accepts]: Start accepts. Automaton has 5323 states and 6059 transitions. Word has length 96 [2021-12-06 22:25:27,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:27,588 INFO L470 AbstractCegarLoop]: Abstraction has 5323 states and 6059 transitions. [2021-12-06 22:25:27,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.515151515151515) internal successors, (232), 66 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:27,588 INFO L276 IsEmpty]: Start isEmpty. Operand 5323 states and 6059 transitions. [2021-12-06 22:25:27,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 22:25:27,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:27,590 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:25:27,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-06 22:25:27,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-06 22:25:27,792 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:25:27,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:27,793 INFO L85 PathProgramCache]: Analyzing trace with hash -568467404, now seen corresponding path program 14 times [2021-12-06 22:25:27,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:27,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8645919] [2021-12-06 22:25:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:27,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 72 proven. 167 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:25:27,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:27,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8645919] [2021-12-06 22:25:27,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8645919] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:27,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509227573] [2021-12-06 22:25:27,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:25:27,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:27,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:27,987 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:27,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-06 22:25:28,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:25:28,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:25:28,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 22:25:28,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 148 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:25:28,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:25:28,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 22:25:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 148 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:25:28,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509227573] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:25:28,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:25:28,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2021-12-06 22:25:28,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345948534] [2021-12-06 22:25:28,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:25:28,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 22:25:28,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:28,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 22:25:28,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1666, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 22:25:28,670 INFO L87 Difference]: Start difference. First operand 5323 states and 6059 transitions. Second operand has 44 states, 43 states have (on average 4.488372093023256) internal successors, (193), 44 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:29,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:29,775 INFO L93 Difference]: Finished difference Result 7243 states and 8225 transitions. [2021-12-06 22:25:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 22:25:29,775 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.488372093023256) internal successors, (193), 44 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-06 22:25:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:29,779 INFO L225 Difference]: With dead ends: 7243 [2021-12-06 22:25:29,779 INFO L226 Difference]: Without dead ends: 7243 [2021-12-06 22:25:29,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=892, Invalid=3664, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 22:25:29,779 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 1557 mSDsluCounter, 3558 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1557 SdHoareTripleChecker+Valid, 3845 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:29,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1557 Valid, 3845 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2451 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:25:29,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7243 states. [2021-12-06 22:25:29,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7243 to 5844. [2021-12-06 22:25:29,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5844 states, 5840 states have (on average 1.141095890410959) internal successors, (6664), 5843 states have internal predecessors, (6664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:29,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5844 states to 5844 states and 6664 transitions. [2021-12-06 22:25:29,834 INFO L78 Accepts]: Start accepts. Automaton has 5844 states and 6664 transitions. Word has length 96 [2021-12-06 22:25:29,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:29,834 INFO L470 AbstractCegarLoop]: Abstraction has 5844 states and 6664 transitions. [2021-12-06 22:25:29,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.488372093023256) internal successors, (193), 44 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:29,834 INFO L276 IsEmpty]: Start isEmpty. Operand 5844 states and 6664 transitions. [2021-12-06 22:25:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 22:25:29,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:29,837 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:25:29,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-12-06 22:25:30,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-06 22:25:30,039 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:25:30,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:30,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2105688800, now seen corresponding path program 2 times [2021-12-06 22:25:30,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:30,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366603233] [2021-12-06 22:25:30,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:30,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 22:25:30,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:30,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366603233] [2021-12-06 22:25:30,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366603233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:30,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630155553] [2021-12-06 22:25:30,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:25:30,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:30,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:30,176 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:30,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-06 22:25:30,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:25:30,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:25:30,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 134 conjunts are in the unsatisfiable core [2021-12-06 22:25:30,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:30,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:25:30,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:25:30,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:25:31,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:25:31,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2021-12-06 22:25:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 7 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:25:31,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:25:32,269 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrstr_#t~post17#1.offset_286| Int) (v_ArrVal_2433 (Array Int Int))) (let ((.cse0 (select v_ArrVal_2433 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 2)))) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrstr_#t~post17#1.offset_286|) (not (= .cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2433) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |v_ULTIMATE.start_cstrstr_#t~post17#1.offset_286|)))) (< |v_ULTIMATE.start_cstrstr_#t~post17#1.offset_286| 0) (= .cse0 0)))) is different from false [2021-12-06 22:25:32,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:32,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-06 22:25:32,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:32,280 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 48 treesize of output 48 [2021-12-06 22:25:32,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:32,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2021-12-06 22:25:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:25:32,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630155553] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:25:32,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:25:32,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 24, 25] total 56 [2021-12-06 22:25:32,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731188485] [2021-12-06 22:25:32,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:25:32,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 22:25:32,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:32,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 22:25:32,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2812, Unknown=1, NotChecked=106, Total=3080 [2021-12-06 22:25:32,854 INFO L87 Difference]: Start difference. First operand 5844 states and 6664 transitions. Second operand has 56 states, 56 states have (on average 4.089285714285714) internal successors, (229), 56 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:34,097 INFO L93 Difference]: Finished difference Result 6470 states and 7320 transitions. [2021-12-06 22:25:34,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 22:25:34,097 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.089285714285714) internal successors, (229), 56 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-06 22:25:34,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:34,101 INFO L225 Difference]: With dead ends: 6470 [2021-12-06 22:25:34,101 INFO L226 Difference]: Without dead ends: 6399 [2021-12-06 22:25:34,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 159 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=344, Invalid=6301, Unknown=1, NotChecked=160, Total=6806 [2021-12-06 22:25:34,101 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 189 mSDsluCounter, 3937 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 4067 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 681 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:34,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 4067 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 918 Invalid, 0 Unknown, 681 Unchecked, 0.3s Time] [2021-12-06 22:25:34,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6399 states. [2021-12-06 22:25:34,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6399 to 5978. [2021-12-06 22:25:34,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5974 states have (on average 1.1404419149648477) internal successors, (6813), 5977 states have internal predecessors, (6813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:34,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 6813 transitions. [2021-12-06 22:25:34,145 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 6813 transitions. Word has length 99 [2021-12-06 22:25:34,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:34,145 INFO L470 AbstractCegarLoop]: Abstraction has 5978 states and 6813 transitions. [2021-12-06 22:25:34,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 4.089285714285714) internal successors, (229), 56 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:34,145 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 6813 transitions. [2021-12-06 22:25:34,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 22:25:34,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:34,148 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:25:34,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-06 22:25:34,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-06 22:25:34,349 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:25:34,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:34,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1738611786, now seen corresponding path program 3 times [2021-12-06 22:25:34,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:34,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327427675] [2021-12-06 22:25:34,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:34,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 51 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:25:34,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327427675] [2021-12-06 22:25:34,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327427675] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106708856] [2021-12-06 22:25:34,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:25:34,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:34,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:34,523 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:34,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-06 22:25:34,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 22:25:34,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:25:34,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 22:25:34,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:34,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:25:34,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:25:34,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:25:34,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:25:35,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:25:35,985 INFO L354 Elim1Store]: treesize reduction 9, result has 66.7 percent of original size [2021-12-06 22:25:35,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-12-06 22:25:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-06 22:25:36,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:25:37,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:37,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2021-12-06 22:25:37,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:25:37,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:37,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 65 [2021-12-06 22:25:37,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:25:37,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-12-06 22:25:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-06 22:25:37,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106708856] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:25:37,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:25:37,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 45 [2021-12-06 22:25:37,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016606694] [2021-12-06 22:25:37,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:25:37,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 22:25:37,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:37,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 22:25:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1855, Unknown=11, NotChecked=0, Total=2070 [2021-12-06 22:25:37,662 INFO L87 Difference]: Start difference. First operand 5978 states and 6813 transitions. Second operand has 46 states, 45 states have (on average 4.644444444444445) internal successors, (209), 46 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:39,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:39,420 INFO L93 Difference]: Finished difference Result 8502 states and 9567 transitions. [2021-12-06 22:25:39,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 22:25:39,421 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 4.644444444444445) internal successors, (209), 46 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-12-06 22:25:39,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:39,425 INFO L225 Difference]: With dead ends: 8502 [2021-12-06 22:25:39,425 INFO L226 Difference]: Without dead ends: 8449 [2021-12-06 22:25:39,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=834, Invalid=6465, Unknown=11, NotChecked=0, Total=7310 [2021-12-06 22:25:39,426 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 180 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:39,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 1847 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 487 Invalid, 0 Unknown, 230 Unchecked, 0.2s Time] [2021-12-06 22:25:39,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8449 states. [2021-12-06 22:25:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8449 to 7045. [2021-12-06 22:25:39,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7045 states, 7041 states have (on average 1.1343559153529328) internal successors, (7987), 7044 states have internal predecessors, (7987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7045 states to 7045 states and 7987 transitions. [2021-12-06 22:25:39,482 INFO L78 Accepts]: Start accepts. Automaton has 7045 states and 7987 transitions. Word has length 100 [2021-12-06 22:25:39,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:39,482 INFO L470 AbstractCegarLoop]: Abstraction has 7045 states and 7987 transitions. [2021-12-06 22:25:39,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 4.644444444444445) internal successors, (209), 46 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:39,482 INFO L276 IsEmpty]: Start isEmpty. Operand 7045 states and 7987 transitions. [2021-12-06 22:25:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 22:25:39,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:39,485 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:25:39,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-12-06 22:25:39,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:39,686 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:25:39,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:39,687 INFO L85 PathProgramCache]: Analyzing trace with hash 861190790, now seen corresponding path program 4 times [2021-12-06 22:25:39,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:39,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375783108] [2021-12-06 22:25:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:39,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 51 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:25:39,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:39,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375783108] [2021-12-06 22:25:39,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375783108] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:39,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969762584] [2021-12-06 22:25:39,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:25:39,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:39,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:39,847 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:39,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-06 22:25:39,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:25:39,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:25:39,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 22:25:39,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:25:40,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:25:40,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 22:25:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:25:40,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969762584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:25:40,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:25:40,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2021-12-06 22:25:40,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052769028] [2021-12-06 22:25:40,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:25:40,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 22:25:40,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:40,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 22:25:40,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-12-06 22:25:40,479 INFO L87 Difference]: Start difference. First operand 7045 states and 7987 transitions. Second operand has 31 states, 30 states have (on average 6.3) internal successors, (189), 31 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:41,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:41,173 INFO L93 Difference]: Finished difference Result 8964 states and 10088 transitions. [2021-12-06 22:25:41,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:25:41,173 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 6.3) internal successors, (189), 31 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-12-06 22:25:41,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:41,178 INFO L225 Difference]: With dead ends: 8964 [2021-12-06 22:25:41,178 INFO L226 Difference]: Without dead ends: 8964 [2021-12-06 22:25:41,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=2014, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 22:25:41,179 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 861 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:41,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 1489 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:25:41,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8964 states. [2021-12-06 22:25:41,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8964 to 6844. [2021-12-06 22:25:41,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6844 states, 6840 states have (on average 1.1333333333333333) internal successors, (7752), 6843 states have internal predecessors, (7752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:41,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6844 states to 6844 states and 7752 transitions. [2021-12-06 22:25:41,241 INFO L78 Accepts]: Start accepts. Automaton has 6844 states and 7752 transitions. Word has length 100 [2021-12-06 22:25:41,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:41,241 INFO L470 AbstractCegarLoop]: Abstraction has 6844 states and 7752 transitions. [2021-12-06 22:25:41,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 6.3) internal successors, (189), 31 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:41,241 INFO L276 IsEmpty]: Start isEmpty. Operand 6844 states and 7752 transitions. [2021-12-06 22:25:41,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 22:25:41,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:41,244 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:25:41,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-12-06 22:25:41,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-12-06 22:25:41,445 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:25:41,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:41,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2122569383, now seen corresponding path program 2 times [2021-12-06 22:25:41,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:41,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410736173] [2021-12-06 22:25:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:41,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-12-06 22:25:41,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:41,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410736173] [2021-12-06 22:25:41,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410736173] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:41,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354789218] [2021-12-06 22:25:41,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:25:41,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:41,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:41,603 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:41,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-06 22:25:41,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 22:25:41,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:25:41,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 22:25:41,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-06 22:25:41,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:25:41,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354789218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:25:41,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:25:41,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 21 [2021-12-06 22:25:41,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46202537] [2021-12-06 22:25:41,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:25:41,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:25:41,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:41,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:25:41,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:25:41,810 INFO L87 Difference]: Start difference. First operand 6844 states and 7752 transitions. Second operand has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:41,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:41,854 INFO L93 Difference]: Finished difference Result 6846 states and 7717 transitions. [2021-12-06 22:25:41,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:25:41,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 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) Word has length 101 [2021-12-06 22:25:41,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:41,859 INFO L225 Difference]: With dead ends: 6846 [2021-12-06 22:25:41,859 INFO L226 Difference]: Without dead ends: 6843 [2021-12-06 22:25:41,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:25:41,859 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 10 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:41,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 159 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:25:41,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6843 states. [2021-12-06 22:25:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6843 to 6695. [2021-12-06 22:25:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6695 states, 6692 states have (on average 1.1277644949193066) internal successors, (7547), 6694 states have internal predecessors, (7547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 7547 transitions. [2021-12-06 22:25:41,918 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 7547 transitions. Word has length 101 [2021-12-06 22:25:41,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:41,918 INFO L470 AbstractCegarLoop]: Abstraction has 6695 states and 7547 transitions. [2021-12-06 22:25:41,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 7547 transitions. [2021-12-06 22:25:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-06 22:25:41,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:41,921 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:25:41,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-12-06 22:25:42,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:42,122 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:25:42,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:42,123 INFO L85 PathProgramCache]: Analyzing trace with hash 71018133, now seen corresponding path program 15 times [2021-12-06 22:25:42,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:42,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984816269] [2021-12-06 22:25:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:42,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:25:42,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:42,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984816269] [2021-12-06 22:25:42,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984816269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:42,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447024117] [2021-12-06 22:25:42,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:25:42,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:42,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:42,460 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:42,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-06 22:25:42,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 22:25:42,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:25:42,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-06 22:25:42,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:42,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:25:42,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:25:42,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:25:43,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:25:43,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 22:25:43,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 22:25:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:25:43,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:25:43,587 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2662 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2662) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0)) is different from false [2021-12-06 22:25:43,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:43,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:25:43,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:43,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:25:43,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:25:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:25:44,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447024117] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:25:44,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:25:44,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 59 [2021-12-06 22:25:44,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322808530] [2021-12-06 22:25:44,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:25:44,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 22:25:44,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:44,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 22:25:44,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=3137, Unknown=1, NotChecked=112, Total=3422 [2021-12-06 22:25:44,187 INFO L87 Difference]: Start difference. First operand 6695 states and 7547 transitions. Second operand has 59 states, 59 states have (on average 3.7796610169491527) internal successors, (223), 59 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:47,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:47,220 INFO L93 Difference]: Finished difference Result 11034 states and 12399 transitions. [2021-12-06 22:25:47,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 22:25:47,220 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.7796610169491527) internal successors, (223), 59 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-06 22:25:47,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:47,227 INFO L225 Difference]: With dead ends: 11034 [2021-12-06 22:25:47,227 INFO L226 Difference]: Without dead ends: 10657 [2021-12-06 22:25:47,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=487, Invalid=8258, Unknown=1, NotChecked=184, Total=8930 [2021-12-06 22:25:47,228 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 2934 mSDsluCounter, 10524 mSDsCounter, 0 mSdLazyCounter, 6693 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2934 SdHoareTripleChecker+Valid, 10820 SdHoareTripleChecker+Invalid, 7246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 6693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 470 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:47,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2934 Valid, 10820 Invalid, 7246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 6693 Invalid, 0 Unknown, 470 Unchecked, 1.7s Time] [2021-12-06 22:25:47,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10657 states. [2021-12-06 22:25:47,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10657 to 8174. [2021-12-06 22:25:47,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8174 states, 8171 states have (on average 1.129849467629421) internal successors, (9232), 8173 states have internal predecessors, (9232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:47,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8174 states to 8174 states and 9232 transitions. [2021-12-06 22:25:47,300 INFO L78 Accepts]: Start accepts. Automaton has 8174 states and 9232 transitions. Word has length 101 [2021-12-06 22:25:47,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:47,301 INFO L470 AbstractCegarLoop]: Abstraction has 8174 states and 9232 transitions. [2021-12-06 22:25:47,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.7796610169491527) internal successors, (223), 59 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:47,301 INFO L276 IsEmpty]: Start isEmpty. Operand 8174 states and 9232 transitions. [2021-12-06 22:25:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 22:25:47,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:47,304 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:25:47,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-12-06 22:25:47,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:47,505 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:25:47,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:47,506 INFO L85 PathProgramCache]: Analyzing trace with hash -87743125, now seen corresponding path program 5 times [2021-12-06 22:25:47,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:47,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285788661] [2021-12-06 22:25:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:47,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 22:25:47,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:47,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285788661] [2021-12-06 22:25:47,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285788661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:47,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498767209] [2021-12-06 22:25:47,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:25:47,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:47,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:47,745 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:47,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-06 22:25:47,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 22:25:47,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:25:47,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 149 conjunts are in the unsatisfiable core [2021-12-06 22:25:47,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:47,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:25:48,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:25:48,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:25:49,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:25:49,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:25:49,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 17 [2021-12-06 22:25:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 58 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:25:49,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:25:50,184 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2716 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2716) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse2 (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2))) (.cse1 (select v_ArrVal_2716 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)))) (or (not (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) .cse1)) (= .cse2 0) (not (= .cse2 .cse1)))))) is different from false [2021-12-06 22:25:50,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:50,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 58 [2021-12-06 22:25:50,198 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-06 22:25:50,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 100 [2021-12-06 22:25:50,211 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-12-06 22:25:50,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 64 [2021-12-06 22:25:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 18 proven. 47 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 22:25:50,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498767209] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:25:50,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:25:50,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 30] total 72 [2021-12-06 22:25:50,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634724459] [2021-12-06 22:25:50,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:25:50,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 22:25:50,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:50,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 22:25:50,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=4636, Unknown=1, NotChecked=138, Total=5112 [2021-12-06 22:25:50,617 INFO L87 Difference]: Start difference. First operand 8174 states and 9232 transitions. Second operand has 72 states, 72 states have (on average 3.4027777777777777) internal successors, (245), 72 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:50,925 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~nondetString2~0#1.base| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (= 3 |c_ULTIMATE.start_main_~i~0#1|) (or (= |c_ULTIMATE.start_main_~length1~0#1| 4) (= |c_ULTIMATE.start_main_~length1~0#1| 3)) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (forall ((v_ArrVal_2716 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2716) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse2 (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2))) (.cse1 (select v_ArrVal_2716 (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)))) (or (not (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) .cse1)) (= .cse2 0) (not (= .cse2 .cse1)))))) (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse4 (select .cse5 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2))) (.cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)))) (or (not (= .cse3 .cse4)) (= .cse4 0) (not (= (select .cse5 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) .cse3)))))) is different from false [2021-12-06 22:25:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:51,332 INFO L93 Difference]: Finished difference Result 8268 states and 9323 transitions. [2021-12-06 22:25:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 22:25:51,333 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.4027777777777777) internal successors, (245), 72 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-06 22:25:51,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:51,337 INFO L225 Difference]: With dead ends: 8268 [2021-12-06 22:25:51,337 INFO L226 Difference]: Without dead ends: 8157 [2021-12-06 22:25:51,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=465, Invalid=6851, Unknown=2, NotChecked=338, Total=7656 [2021-12-06 22:25:51,338 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 166 mSDsluCounter, 2138 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 2204 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:51,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 2204 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 896 Invalid, 0 Unknown, 322 Unchecked, 0.3s Time] [2021-12-06 22:25:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8157 states. [2021-12-06 22:25:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8157 to 8152. [2021-12-06 22:25:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8152 states, 8149 states have (on average 1.1298318812124186) internal successors, (9207), 8151 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:51,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8152 states to 8152 states and 9207 transitions. [2021-12-06 22:25:51,397 INFO L78 Accepts]: Start accepts. Automaton has 8152 states and 9207 transitions. Word has length 104 [2021-12-06 22:25:51,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:51,398 INFO L470 AbstractCegarLoop]: Abstraction has 8152 states and 9207 transitions. [2021-12-06 22:25:51,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.4027777777777777) internal successors, (245), 72 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:51,398 INFO L276 IsEmpty]: Start isEmpty. Operand 8152 states and 9207 transitions. [2021-12-06 22:25:51,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-06 22:25:51,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:51,401 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:25:51,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-12-06 22:25:51,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:51,602 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:25:51,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:51,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1903810265, now seen corresponding path program 4 times [2021-12-06 22:25:51,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:51,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741930437] [2021-12-06 22:25:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:51,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 22:25:51,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:51,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741930437] [2021-12-06 22:25:51,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741930437] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:51,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446708393] [2021-12-06 22:25:51,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:25:51,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:51,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:51,781 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:51,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-06 22:25:51,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:25:51,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:25:51,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 22:25:51,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:51,919 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:25:51,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:25:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 22:25:52,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:25:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-06 22:25:52,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446708393] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:25:52,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:25:52,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 41 [2021-12-06 22:25:52,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901380340] [2021-12-06 22:25:52,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:25:52,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 22:25:52,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:52,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 22:25:52,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1353, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 22:25:52,406 INFO L87 Difference]: Start difference. First operand 8152 states and 9207 transitions. Second operand has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:52,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:25:52,994 INFO L93 Difference]: Finished difference Result 15723 states and 17651 transitions. [2021-12-06 22:25:52,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:25:52,995 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-06 22:25:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:25:53,005 INFO L225 Difference]: With dead ends: 15723 [2021-12-06 22:25:53,005 INFO L226 Difference]: Without dead ends: 15692 [2021-12-06 22:25:53,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=842, Invalid=2818, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 22:25:53,006 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1453 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1453 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:25:53,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1453 Valid, 935 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:25:53,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15692 states. [2021-12-06 22:25:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15692 to 8282. [2021-12-06 22:25:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8282 states, 8279 states have (on average 1.1296050247614446) internal successors, (9352), 8281 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8282 states to 8282 states and 9352 transitions. [2021-12-06 22:25:53,095 INFO L78 Accepts]: Start accepts. Automaton has 8282 states and 9352 transitions. Word has length 105 [2021-12-06 22:25:53,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:25:53,095 INFO L470 AbstractCegarLoop]: Abstraction has 8282 states and 9352 transitions. [2021-12-06 22:25:53,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:25:53,095 INFO L276 IsEmpty]: Start isEmpty. Operand 8282 states and 9352 transitions. [2021-12-06 22:25:53,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-06 22:25:53,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:25:53,099 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:25:53,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-12-06 22:25:53,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:53,300 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:25:53,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:25:53,301 INFO L85 PathProgramCache]: Analyzing trace with hash -77506239, now seen corresponding path program 6 times [2021-12-06 22:25:53,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:25:53,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107517120] [2021-12-06 22:25:53,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:25:53,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:25:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:25:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 22:25:53,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:25:53,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107517120] [2021-12-06 22:25:53,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107517120] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:25:53,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166979262] [2021-12-06 22:25:53,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:25:53,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:25:53,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:25:53,829 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:25:53,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-06 22:25:54,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 22:25:54,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:25:54,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 156 conjunts are in the unsatisfiable core [2021-12-06 22:25:54,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:25:54,024 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:25:54,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:25:54,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:25:54,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:25:54,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:25:55,209 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 22:25:55,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 22:25:56,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:25:56,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:25:56,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2021-12-06 22:25:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:25:56,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:25:58,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:58,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 41 [2021-12-06 22:25:58,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:25:58,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:58,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 80 [2021-12-06 22:25:58,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:25:58,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:25:58,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 53 [2021-12-06 22:25:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 9 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:25:59,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166979262] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:25:59,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:25:59,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 38, 38] total 99 [2021-12-06 22:25:59,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498173242] [2021-12-06 22:25:59,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:25:59,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-06 22:25:59,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:25:59,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-06 22:25:59,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=9192, Unknown=1, NotChecked=0, Total=9702 [2021-12-06 22:25:59,846 INFO L87 Difference]: Start difference. First operand 8282 states and 9352 transitions. Second operand has 99 states, 99 states have (on average 2.9797979797979797) internal successors, (295), 99 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:06,814 INFO L93 Difference]: Finished difference Result 8511 states and 9594 transitions. [2021-12-06 22:26:06,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-06 22:26:06,815 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.9797979797979797) internal successors, (295), 99 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-06 22:26:06,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:06,819 INFO L225 Difference]: With dead ends: 8511 [2021-12-06 22:26:06,819 INFO L226 Difference]: Without dead ends: 8475 [2021-12-06 22:26:06,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7762 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1589, Invalid=27476, Unknown=5, NotChecked=0, Total=29070 [2021-12-06 22:26:06,820 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 625 mSDsluCounter, 3810 mSDsCounter, 0 mSdLazyCounter, 2175 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 3899 SdHoareTripleChecker+Invalid, 3127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 827 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:06,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 3899 Invalid, 3127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2175 Invalid, 0 Unknown, 827 Unchecked, 0.9s Time] [2021-12-06 22:26:06,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8475 states. [2021-12-06 22:26:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8475 to 8332. [2021-12-06 22:26:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8332 states, 8329 states have (on average 1.1293072397646777) internal successors, (9406), 8331 states have internal predecessors, (9406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8332 states to 8332 states and 9406 transitions. [2021-12-06 22:26:06,882 INFO L78 Accepts]: Start accepts. Automaton has 8332 states and 9406 transitions. Word has length 105 [2021-12-06 22:26:06,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:06,882 INFO L470 AbstractCegarLoop]: Abstraction has 8332 states and 9406 transitions. [2021-12-06 22:26:06,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.9797979797979797) internal successors, (295), 99 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:06,883 INFO L276 IsEmpty]: Start isEmpty. Operand 8332 states and 9406 transitions. [2021-12-06 22:26:06,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-06 22:26:06,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:06,886 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:06,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-12-06 22:26:07,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-12-06 22:26:07,088 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:26:07,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:07,089 INFO L85 PathProgramCache]: Analyzing trace with hash -421789288, now seen corresponding path program 16 times [2021-12-06 22:26:07,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:07,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775549888] [2021-12-06 22:26:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:07,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 98 proven. 211 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:26:07,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:07,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775549888] [2021-12-06 22:26:07,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775549888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:07,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181155120] [2021-12-06 22:26:07,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:26:07,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:07,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:07,328 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:07,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-06 22:26:07,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:26:07,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:26:07,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-06 22:26:07,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 128 proven. 181 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:26:07,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:26:08,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 22:26:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 128 proven. 181 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:26:08,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181155120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:26:08,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:26:08,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 46 [2021-12-06 22:26:08,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385151326] [2021-12-06 22:26:08,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:26:08,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 22:26:08,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:08,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 22:26:08,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 22:26:08,058 INFO L87 Difference]: Start difference. First operand 8332 states and 9406 transitions. Second operand has 47 states, 46 states have (on average 4.804347826086956) internal successors, (221), 47 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:09,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:09,440 INFO L93 Difference]: Finished difference Result 11162 states and 12546 transitions. [2021-12-06 22:26:09,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 22:26:09,440 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.804347826086956) internal successors, (221), 47 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-06 22:26:09,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:09,447 INFO L225 Difference]: With dead ends: 11162 [2021-12-06 22:26:09,447 INFO L226 Difference]: Without dead ends: 11162 [2021-12-06 22:26:09,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1022, Invalid=4234, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 22:26:09,447 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 1690 mSDsluCounter, 5308 mSDsCounter, 0 mSdLazyCounter, 3466 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 5630 SdHoareTripleChecker+Invalid, 3502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:09,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1690 Valid, 5630 Invalid, 3502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3466 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 22:26:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11162 states. [2021-12-06 22:26:09,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11162 to 8709. [2021-12-06 22:26:09,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8709 states, 8706 states have (on average 1.1300252699287847) internal successors, (9838), 8708 states have internal predecessors, (9838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8709 states to 8709 states and 9838 transitions. [2021-12-06 22:26:09,521 INFO L78 Accepts]: Start accepts. Automaton has 8709 states and 9838 transitions. Word has length 105 [2021-12-06 22:26:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:09,521 INFO L470 AbstractCegarLoop]: Abstraction has 8709 states and 9838 transitions. [2021-12-06 22:26:09,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.804347826086956) internal successors, (221), 47 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand 8709 states and 9838 transitions. [2021-12-06 22:26:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-06 22:26:09,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:09,525 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:09,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-12-06 22:26:09,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-12-06 22:26:09,726 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:26:09,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:09,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1254140446, now seen corresponding path program 3 times [2021-12-06 22:26:09,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:09,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193583134] [2021-12-06 22:26:09,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:09,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 22:26:09,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:09,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193583134] [2021-12-06 22:26:09,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193583134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:09,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702277505] [2021-12-06 22:26:09,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:26:09,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:09,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:09,867 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:09,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-06 22:26:10,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 22:26:10,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:26:10,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 22:26:10,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:10,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:26:10,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:26:10,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:26:10,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:26:11,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:26:11,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 22:26:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-06 22:26:11,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:26:11,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:26:11,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:26:11,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:26:11,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:26:11,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:26:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-06 22:26:12,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702277505] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:26:12,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:26:12,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2021-12-06 22:26:12,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383385048] [2021-12-06 22:26:12,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:26:12,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 22:26:12,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:12,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 22:26:12,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=951, Unknown=6, NotChecked=0, Total=1056 [2021-12-06 22:26:12,332 INFO L87 Difference]: Start difference. First operand 8709 states and 9838 transitions. Second operand has 33 states, 33 states have (on average 6.333333333333333) internal successors, (209), 33 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:12,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:12,982 INFO L93 Difference]: Finished difference Result 8525 states and 9415 transitions. [2021-12-06 22:26:12,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:26:12,983 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.333333333333333) internal successors, (209), 33 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-06 22:26:12,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:12,987 INFO L225 Difference]: With dead ends: 8525 [2021-12-06 22:26:12,987 INFO L226 Difference]: Without dead ends: 7805 [2021-12-06 22:26:12,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=339, Invalid=2625, Unknown=6, NotChecked=0, Total=2970 [2021-12-06 22:26:12,987 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 48 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:12,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 653 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 73 Unchecked, 0.0s Time] [2021-12-06 22:26:12,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2021-12-06 22:26:13,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 4734. [2021-12-06 22:26:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4734 states, 4731 states have (on average 1.1037835552737265) internal successors, (5222), 4733 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4734 states to 4734 states and 5222 transitions. [2021-12-06 22:26:13,031 INFO L78 Accepts]: Start accepts. Automaton has 4734 states and 5222 transitions. Word has length 107 [2021-12-06 22:26:13,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:13,032 INFO L470 AbstractCegarLoop]: Abstraction has 4734 states and 5222 transitions. [2021-12-06 22:26:13,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.333333333333333) internal successors, (209), 33 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:13,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4734 states and 5222 transitions. [2021-12-06 22:26:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-06 22:26:13,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:13,034 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:13,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-12-06 22:26:13,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:13,236 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:26:13,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:13,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1163595242, now seen corresponding path program 5 times [2021-12-06 22:26:13,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:13,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022405210] [2021-12-06 22:26:13,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:13,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 22:26:13,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:13,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022405210] [2021-12-06 22:26:13,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022405210] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:13,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247763921] [2021-12-06 22:26:13,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:26:13,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:13,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:13,451 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:13,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-06 22:26:13,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 22:26:13,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:26:13,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 22:26:13,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:13,648 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:26:13,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:26:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 45 proven. 81 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 22:26:14,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:26:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 66 proven. 60 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 22:26:14,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247763921] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:26:14,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:26:14,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 45 [2021-12-06 22:26:14,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876057325] [2021-12-06 22:26:14,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:26:14,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 22:26:14,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:14,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 22:26:14,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1810, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 22:26:14,547 INFO L87 Difference]: Start difference. First operand 4734 states and 5222 transitions. Second operand has 46 states, 45 states have (on average 5.622222222222222) internal successors, (253), 46 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:15,313 INFO L93 Difference]: Finished difference Result 11631 states and 12736 transitions. [2021-12-06 22:26:15,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:26:15,313 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 5.622222222222222) internal successors, (253), 46 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-06 22:26:15,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:15,320 INFO L225 Difference]: With dead ends: 11631 [2021-12-06 22:26:15,320 INFO L226 Difference]: Without dead ends: 11631 [2021-12-06 22:26:15,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=895, Invalid=3395, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 22:26:15,320 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 1188 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:15,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 1638 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:26:15,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11631 states. [2021-12-06 22:26:15,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11631 to 4950. [2021-12-06 22:26:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4950 states, 4947 states have (on average 1.1045077824944411) internal successors, (5464), 4949 states have internal predecessors, (5464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:15,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4950 states to 4950 states and 5464 transitions. [2021-12-06 22:26:15,374 INFO L78 Accepts]: Start accepts. Automaton has 4950 states and 5464 transitions. Word has length 109 [2021-12-06 22:26:15,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:15,374 INFO L470 AbstractCegarLoop]: Abstraction has 4950 states and 5464 transitions. [2021-12-06 22:26:15,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 5.622222222222222) internal successors, (253), 46 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:15,374 INFO L276 IsEmpty]: Start isEmpty. Operand 4950 states and 5464 transitions. [2021-12-06 22:26:15,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-06 22:26:15,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:15,377 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:15,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-12-06 22:26:15,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:15,578 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:26:15,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:15,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1127300175, now seen corresponding path program 17 times [2021-12-06 22:26:15,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:15,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268349358] [2021-12-06 22:26:15,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:15,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:26:15,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:15,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268349358] [2021-12-06 22:26:15,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268349358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:15,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015684567] [2021-12-06 22:26:15,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:26:15,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:15,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:15,951 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:15,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-06 22:26:16,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 22:26:16,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:26:16,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-06 22:26:16,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:16,159 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:26:16,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:26:16,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:26:16,754 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:26:16,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-06 22:26:16,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2021-12-06 22:26:18,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:26:18,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2021-12-06 22:26:18,883 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 22:26:18,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 22:26:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:26:18,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:26:19,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:26:19,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:26:19,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:26:19,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:26:19,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:26:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:26:20,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015684567] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:26:20,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:26:20,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32, 32] total 84 [2021-12-06 22:26:20,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945365810] [2021-12-06 22:26:20,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:26:20,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-06 22:26:20,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:20,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-06 22:26:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=6695, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 22:26:20,621 INFO L87 Difference]: Start difference. First operand 4950 states and 5464 transitions. Second operand has 84 states, 84 states have (on average 3.6666666666666665) internal successors, (308), 84 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:26,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:26,194 INFO L93 Difference]: Finished difference Result 8783 states and 9665 transitions. [2021-12-06 22:26:26,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 22:26:26,194 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.6666666666666665) internal successors, (308), 84 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-06 22:26:26,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:26,205 INFO L225 Difference]: With dead ends: 8783 [2021-12-06 22:26:26,205 INFO L226 Difference]: Without dead ends: 8653 [2021-12-06 22:26:26,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3199 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1208, Invalid=20254, Unknown=0, NotChecked=0, Total=21462 [2021-12-06 22:26:26,206 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 1975 mSDsluCounter, 12691 mSDsCounter, 0 mSdLazyCounter, 7535 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1975 SdHoareTripleChecker+Valid, 12963 SdHoareTripleChecker+Invalid, 9404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 7535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1705 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:26,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1975 Valid, 12963 Invalid, 9404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 7535 Invalid, 0 Unknown, 1705 Unchecked, 2.1s Time] [2021-12-06 22:26:26,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8653 states. [2021-12-06 22:26:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8653 to 5847. [2021-12-06 22:26:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5847 states, 5844 states have (on average 1.105407255304586) internal successors, (6460), 5846 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5847 states to 5847 states and 6460 transitions. [2021-12-06 22:26:26,254 INFO L78 Accepts]: Start accepts. Automaton has 5847 states and 6460 transitions. Word has length 110 [2021-12-06 22:26:26,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:26,254 INFO L470 AbstractCegarLoop]: Abstraction has 5847 states and 6460 transitions. [2021-12-06 22:26:26,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.6666666666666665) internal successors, (308), 84 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:26,255 INFO L276 IsEmpty]: Start isEmpty. Operand 5847 states and 6460 transitions. [2021-12-06 22:26:26,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 22:26:26,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:26,257 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:26,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-12-06 22:26:26,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:26,458 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:26:26,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:26,459 INFO L85 PathProgramCache]: Analyzing trace with hash -717491159, now seen corresponding path program 3 times [2021-12-06 22:26:26,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:26,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163059314] [2021-12-06 22:26:26,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:26,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 20 proven. 191 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:26:26,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:26,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163059314] [2021-12-06 22:26:26,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163059314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:26,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161193013] [2021-12-06 22:26:26,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:26:26,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:26,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:26,771 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:26,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-06 22:26:26,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 22:26:26,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:26:26,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-06 22:26:26,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:26,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:26:26,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:26:27,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 22:26:27,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 22:26:27,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:26:27,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 22:26:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 25 proven. 34 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-12-06 22:26:27,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:26:28,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:26:28,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:26:28,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:26:28,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:26:28,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:26:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-12-06 22:26:28,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161193013] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:26:28,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:26:28,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 48 [2021-12-06 22:26:28,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288301058] [2021-12-06 22:26:28,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:26:28,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 22:26:28,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:28,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 22:26:28,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2094, Unknown=17, NotChecked=0, Total=2256 [2021-12-06 22:26:28,636 INFO L87 Difference]: Start difference. First operand 5847 states and 6460 transitions. Second operand has 48 states, 48 states have (on average 4.375) internal successors, (210), 48 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) [2021-12-06 22:26:34,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:34,167 INFO L93 Difference]: Finished difference Result 6947 states and 7632 transitions. [2021-12-06 22:26:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-06 22:26:34,167 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.375) internal successors, (210), 48 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-06 22:26:34,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:34,170 INFO L225 Difference]: With dead ends: 6947 [2021-12-06 22:26:34,170 INFO L226 Difference]: Without dead ends: 6269 [2021-12-06 22:26:34,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3648 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2511, Invalid=15294, Unknown=17, NotChecked=0, Total=17822 [2021-12-06 22:26:34,171 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 1430 mSDsluCounter, 3906 mSDsCounter, 0 mSdLazyCounter, 3929 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1430 SdHoareTripleChecker+Valid, 4085 SdHoareTripleChecker+Invalid, 4205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:34,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1430 Valid, 4085 Invalid, 4205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3929 Invalid, 0 Unknown, 114 Unchecked, 1.2s Time] [2021-12-06 22:26:34,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6269 states. [2021-12-06 22:26:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6269 to 4383. [2021-12-06 22:26:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4383 states, 4381 states have (on average 1.103629308377083) internal successors, (4835), 4382 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:34,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4383 states to 4383 states and 4835 transitions. [2021-12-06 22:26:34,217 INFO L78 Accepts]: Start accepts. Automaton has 4383 states and 4835 transitions. Word has length 112 [2021-12-06 22:26:34,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:34,217 INFO L470 AbstractCegarLoop]: Abstraction has 4383 states and 4835 transitions. [2021-12-06 22:26:34,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.375) internal successors, (210), 48 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) [2021-12-06 22:26:34,217 INFO L276 IsEmpty]: Start isEmpty. Operand 4383 states and 4835 transitions. [2021-12-06 22:26:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-06 22:26:34,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:34,219 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:34,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-12-06 22:26:34,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:34,420 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:26:34,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:34,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1426311869, now seen corresponding path program 7 times [2021-12-06 22:26:34,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:34,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333880836] [2021-12-06 22:26:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:34,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 32 proven. 89 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 22:26:34,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:34,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333880836] [2021-12-06 22:26:34,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333880836] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:34,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988598296] [2021-12-06 22:26:34,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:26:34,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:34,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:34,582 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:34,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-06 22:26:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:34,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 22:26:34,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:34,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:26:34,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:26:34,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:26:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 22:26:35,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:26:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 22:26:35,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988598296] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:26:35,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:26:35,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2021-12-06 22:26:35,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328950251] [2021-12-06 22:26:35,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:26:35,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 22:26:35,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:35,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 22:26:35,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1931, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 22:26:35,815 INFO L87 Difference]: Start difference. First operand 4383 states and 4835 transitions. Second operand has 47 states, 46 states have (on average 6.021739130434782) internal successors, (277), 47 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:36,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:36,970 INFO L93 Difference]: Finished difference Result 6242 states and 6854 transitions. [2021-12-06 22:26:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:26:36,970 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 6.021739130434782) internal successors, (277), 47 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-12-06 22:26:36,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:36,973 INFO L225 Difference]: With dead ends: 6242 [2021-12-06 22:26:36,973 INFO L226 Difference]: Without dead ends: 5831 [2021-12-06 22:26:36,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1032, Invalid=4370, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 22:26:36,974 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 1574 mSDsluCounter, 2317 mSDsCounter, 0 mSdLazyCounter, 1881 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 2459 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:36,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1574 Valid, 2459 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1881 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:26:36,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5831 states. [2021-12-06 22:26:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5831 to 4261. [2021-12-06 22:26:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4261 states, 4259 states have (on average 1.1021366517961964) internal successors, (4694), 4260 states have internal predecessors, (4694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:37,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4261 states to 4261 states and 4694 transitions. [2021-12-06 22:26:37,017 INFO L78 Accepts]: Start accepts. Automaton has 4261 states and 4694 transitions. Word has length 114 [2021-12-06 22:26:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:37,017 INFO L470 AbstractCegarLoop]: Abstraction has 4261 states and 4694 transitions. [2021-12-06 22:26:37,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 6.021739130434782) internal successors, (277), 47 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:37,017 INFO L276 IsEmpty]: Start isEmpty. Operand 4261 states and 4694 transitions. [2021-12-06 22:26:37,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 22:26:37,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:37,019 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:37,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-12-06 22:26:37,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:37,220 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:26:37,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:37,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1385386516, now seen corresponding path program 6 times [2021-12-06 22:26:37,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:37,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218755752] [2021-12-06 22:26:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:37,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 95 proven. 15 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-06 22:26:37,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:37,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218755752] [2021-12-06 22:26:37,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218755752] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:37,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387610471] [2021-12-06 22:26:37,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:26:37,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:37,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:37,411 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:37,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-06 22:26:37,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 22:26:37,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:26:37,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 22:26:37,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:37,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:26:37,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:26:37,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:26:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 65 proven. 15 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-06 22:26:37,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:26:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 65 proven. 15 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-06 22:26:38,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387610471] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:26:38,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:26:38,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 33 [2021-12-06 22:26:38,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762298906] [2021-12-06 22:26:38,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:26:38,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 22:26:38,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:38,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 22:26:38,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 22:26:38,205 INFO L87 Difference]: Start difference. First operand 4261 states and 4694 transitions. Second operand has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:38,383 INFO L93 Difference]: Finished difference Result 4286 states and 4718 transitions. [2021-12-06 22:26:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:26:38,383 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-12-06 22:26:38,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:38,386 INFO L225 Difference]: With dead ends: 4286 [2021-12-06 22:26:38,386 INFO L226 Difference]: Without dead ends: 4213 [2021-12-06 22:26:38,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=1261, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 22:26:38,386 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 174 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:38,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 422 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:26:38,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2021-12-06 22:26:38,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 4213. [2021-12-06 22:26:38,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4211 states have (on average 1.1025884587983852) internal successors, (4643), 4212 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 4643 transitions. [2021-12-06 22:26:38,413 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 4643 transitions. Word has length 117 [2021-12-06 22:26:38,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:38,413 INFO L470 AbstractCegarLoop]: Abstraction has 4213 states and 4643 transitions. [2021-12-06 22:26:38,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 4643 transitions. [2021-12-06 22:26:38,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 22:26:38,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:38,415 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:38,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-12-06 22:26:38,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:38,616 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:26:38,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:38,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1544248593, now seen corresponding path program 7 times [2021-12-06 22:26:38,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:38,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346174718] [2021-12-06 22:26:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:38,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 95 proven. 28 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-06 22:26:38,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:38,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346174718] [2021-12-06 22:26:38,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346174718] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:38,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298955844] [2021-12-06 22:26:38,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:26:38,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:38,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:38,807 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:38,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-06 22:26:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:38,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 22:26:38,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:38,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:26:38,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:26:38,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:26:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 83 proven. 28 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-06 22:26:39,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:26:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 83 proven. 28 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-06 22:26:39,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298955844] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:26:39,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:26:39,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 36 [2021-12-06 22:26:39,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866330977] [2021-12-06 22:26:39,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:26:39,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 22:26:39,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:39,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 22:26:39,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 22:26:39,478 INFO L87 Difference]: Start difference. First operand 4213 states and 4643 transitions. Second operand has 36 states, 36 states have (on average 5.222222222222222) internal successors, (188), 36 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:39,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:39,952 INFO L93 Difference]: Finished difference Result 4351 states and 4785 transitions. [2021-12-06 22:26:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 22:26:39,952 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.222222222222222) internal successors, (188), 36 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-06 22:26:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:39,955 INFO L225 Difference]: With dead ends: 4351 [2021-12-06 22:26:39,955 INFO L226 Difference]: Without dead ends: 4127 [2021-12-06 22:26:39,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=473, Invalid=2077, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 22:26:39,955 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 355 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:39,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 962 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:26:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2021-12-06 22:26:39,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 4127. [2021-12-06 22:26:39,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4127 states, 4125 states have (on average 1.1032727272727272) internal successors, (4551), 4126 states have internal predecessors, (4551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4127 states to 4127 states and 4551 transitions. [2021-12-06 22:26:39,987 INFO L78 Accepts]: Start accepts. Automaton has 4127 states and 4551 transitions. Word has length 121 [2021-12-06 22:26:39,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:39,987 INFO L470 AbstractCegarLoop]: Abstraction has 4127 states and 4551 transitions. [2021-12-06 22:26:39,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.222222222222222) internal successors, (188), 36 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:39,987 INFO L276 IsEmpty]: Start isEmpty. Operand 4127 states and 4551 transitions. [2021-12-06 22:26:39,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 22:26:39,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:39,990 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:40,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-12-06 22:26:40,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-12-06 22:26:40,191 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:26:40,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:40,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1250352153, now seen corresponding path program 8 times [2021-12-06 22:26:40,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:40,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939992293] [2021-12-06 22:26:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:40,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 50 proven. 121 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 22:26:40,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:40,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939992293] [2021-12-06 22:26:40,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939992293] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:40,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166809034] [2021-12-06 22:26:40,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:26:40,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:40,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:40,372 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:40,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-06 22:26:40,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:26:40,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:26:40,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-06 22:26:40,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:40,525 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:26:40,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:26:41,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 22:26:41,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:26:41,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-12-06 22:26:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 105 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 22:26:41,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:26:42,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-12-06 22:26:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 91 proven. 80 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 22:26:44,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166809034] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:26:44,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:26:44,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 21] total 58 [2021-12-06 22:26:44,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080916249] [2021-12-06 22:26:44,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:26:44,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 22:26:44,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:44,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 22:26:44,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=3073, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 22:26:44,121 INFO L87 Difference]: Start difference. First operand 4127 states and 4551 transitions. Second operand has 59 states, 58 states have (on average 5.241379310344827) internal successors, (304), 59 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:45,350 INFO L93 Difference]: Finished difference Result 4853 states and 5361 transitions. [2021-12-06 22:26:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 22:26:45,351 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 5.241379310344827) internal successors, (304), 59 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-12-06 22:26:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:45,353 INFO L225 Difference]: With dead ends: 4853 [2021-12-06 22:26:45,354 INFO L226 Difference]: Without dead ends: 4845 [2021-12-06 22:26:45,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 208 SyntacticMatches, 8 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=847, Invalid=6293, Unknown=0, NotChecked=0, Total=7140 [2021-12-06 22:26:45,354 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 409 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:45,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 1785 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 632 Invalid, 0 Unknown, 182 Unchecked, 0.2s Time] [2021-12-06 22:26:45,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4845 states. [2021-12-06 22:26:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4845 to 4322. [2021-12-06 22:26:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 4320 states have (on average 1.107175925925926) internal successors, (4783), 4321 states have internal predecessors, (4783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 4783 transitions. [2021-12-06 22:26:45,385 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 4783 transitions. Word has length 123 [2021-12-06 22:26:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:45,385 INFO L470 AbstractCegarLoop]: Abstraction has 4322 states and 4783 transitions. [2021-12-06 22:26:45,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 5.241379310344827) internal successors, (304), 59 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 4783 transitions. [2021-12-06 22:26:45,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 22:26:45,387 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:45,387 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:45,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-12-06 22:26:45,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:45,588 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:26:45,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:45,589 INFO L85 PathProgramCache]: Analyzing trace with hash -11687961, now seen corresponding path program 9 times [2021-12-06 22:26:45,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:45,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111982055] [2021-12-06 22:26:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:45,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 50 proven. 121 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-06 22:26:45,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:45,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111982055] [2021-12-06 22:26:45,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111982055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:45,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471126826] [2021-12-06 22:26:45,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:26:45,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:45,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:45,767 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:45,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-06 22:26:45,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 22:26:45,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:26:45,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 22:26:45,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:45,948 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:26:45,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:26:46,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:26:46,312 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-12-06 22:26:46,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 22:26:46,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:26:46,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 22:26:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-06 22:26:46,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:26:47,111 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 46 treesize of output 42 [2021-12-06 22:26:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-06 22:26:48,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471126826] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:26:48,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:26:48,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 36 [2021-12-06 22:26:48,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467283080] [2021-12-06 22:26:48,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:26:48,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 22:26:48,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:48,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 22:26:48,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 22:26:48,655 INFO L87 Difference]: Start difference. First operand 4322 states and 4783 transitions. Second operand has 37 states, 36 states have (on average 6.0) internal successors, (216), 37 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:50,835 INFO L93 Difference]: Finished difference Result 6260 states and 6878 transitions. [2021-12-06 22:26:50,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-06 22:26:50,836 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 6.0) internal successors, (216), 37 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 123 [2021-12-06 22:26:50,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:50,837 INFO L225 Difference]: With dead ends: 6260 [2021-12-06 22:26:50,837 INFO L226 Difference]: Without dead ends: 3038 [2021-12-06 22:26:50,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3295 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1634, Invalid=11022, Unknown=0, NotChecked=0, Total=12656 [2021-12-06 22:26:50,838 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 1059 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:50,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1059 Valid, 1972 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1390 Invalid, 0 Unknown, 288 Unchecked, 0.5s Time] [2021-12-06 22:26:50,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2021-12-06 22:26:50,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 1086. [2021-12-06 22:26:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 1.096774193548387) internal successors, (1190), 1085 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1190 transitions. [2021-12-06 22:26:50,850 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1190 transitions. Word has length 123 [2021-12-06 22:26:50,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:50,850 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 1190 transitions. [2021-12-06 22:26:50,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 6.0) internal successors, (216), 37 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:50,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1190 transitions. [2021-12-06 22:26:50,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 22:26:50,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:50,851 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:50,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-12-06 22:26:51,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-12-06 22:26:51,052 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:26:51,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:51,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2074369650, now seen corresponding path program 8 times [2021-12-06 22:26:51,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:51,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155795927] [2021-12-06 22:26:51,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:51,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 95 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-06 22:26:51,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:51,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155795927] [2021-12-06 22:26:51,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155795927] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:51,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762153216] [2021-12-06 22:26:51,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:26:51,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:51,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:51,257 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:51,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-06 22:26:51,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:26:51,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:26:51,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 22:26:51,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:51,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:26:51,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:26:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 95 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-06 22:26:51,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:26:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 95 proven. 45 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-06 22:26:52,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762153216] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:26:52,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:26:52,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 44 [2021-12-06 22:26:52,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401472613] [2021-12-06 22:26:52,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:26:52,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 22:26:52,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:52,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 22:26:52,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1604, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 22:26:52,258 INFO L87 Difference]: Start difference. First operand 1086 states and 1190 transitions. Second operand has 44 states, 44 states have (on average 5.4772727272727275) internal successors, (241), 44 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:53,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:53,151 INFO L93 Difference]: Finished difference Result 1851 states and 2005 transitions. [2021-12-06 22:26:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 22:26:53,152 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.4772727272727275) internal successors, (241), 44 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 125 [2021-12-06 22:26:53,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:53,152 INFO L225 Difference]: With dead ends: 1851 [2021-12-06 22:26:53,152 INFO L226 Difference]: Without dead ends: 990 [2021-12-06 22:26:53,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=977, Invalid=4425, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 22:26:53,153 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 710 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:53,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 1719 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:26:53,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-12-06 22:26:53,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 990. [2021-12-06 22:26:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 989 states have (on average 1.1001011122345803) internal successors, (1088), 989 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:53,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1088 transitions. [2021-12-06 22:26:53,159 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1088 transitions. Word has length 125 [2021-12-06 22:26:53,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:53,160 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 1088 transitions. [2021-12-06 22:26:53,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.4772727272727275) internal successors, (241), 44 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:53,160 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1088 transitions. [2021-12-06 22:26:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-06 22:26:53,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:53,161 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:53,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-12-06 22:26:53,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:53,362 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:26:53,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:53,363 INFO L85 PathProgramCache]: Analyzing trace with hash -889313032, now seen corresponding path program 9 times [2021-12-06 22:26:53,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:53,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670410388] [2021-12-06 22:26:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:53,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 44 proven. 74 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-06 22:26:53,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:53,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670410388] [2021-12-06 22:26:53,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670410388] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:53,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086730129] [2021-12-06 22:26:53,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:26:53,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:53,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:53,529 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:53,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-06 22:26:53,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 22:26:53,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:26:53,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 22:26:53,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 44 proven. 74 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-06 22:26:54,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:26:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 44 proven. 74 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-06 22:26:54,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086730129] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:26:54,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:26:54,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2021-12-06 22:26:54,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970474837] [2021-12-06 22:26:54,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:26:54,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 22:26:54,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:54,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 22:26:54,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-12-06 22:26:54,448 INFO L87 Difference]: Start difference. First operand 990 states and 1088 transitions. Second operand has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 26 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:54,697 INFO L93 Difference]: Finished difference Result 2200 states and 2399 transitions. [2021-12-06 22:26:54,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:26:54,697 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 26 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-12-06 22:26:54,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:54,698 INFO L225 Difference]: With dead ends: 2200 [2021-12-06 22:26:54,698 INFO L226 Difference]: Without dead ends: 1006 [2021-12-06 22:26:54,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 252 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 22:26:54,698 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 397 mSDsluCounter, 1512 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:54,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 1631 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:26:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-12-06 22:26:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1002. [2021-12-06 22:26:54,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 1.098901098901099) internal successors, (1100), 1001 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1100 transitions. [2021-12-06 22:26:54,705 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1100 transitions. Word has length 133 [2021-12-06 22:26:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:54,705 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 1100 transitions. [2021-12-06 22:26:54,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 26 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:54,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1100 transitions. [2021-12-06 22:26:54,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-06 22:26:54,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:54,706 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:54,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-12-06 22:26:54,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-12-06 22:26:54,907 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:26:54,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:54,908 INFO L85 PathProgramCache]: Analyzing trace with hash -624399716, now seen corresponding path program 10 times [2021-12-06 22:26:54,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:54,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095908175] [2021-12-06 22:26:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:54,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 40 proven. 66 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-06 22:26:55,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:55,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095908175] [2021-12-06 22:26:55,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095908175] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:55,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084378810] [2021-12-06 22:26:55,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:26:55,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:55,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:55,108 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:55,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-06 22:26:55,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:26:55,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:26:55,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 22:26:55,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:55,270 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:26:55,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:26:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 40 proven. 66 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-06 22:26:55,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:26:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 40 proven. 66 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-12-06 22:26:55,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084378810] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:26:55,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:26:55,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 45 [2021-12-06 22:26:55,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956736621] [2021-12-06 22:26:55,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:26:55,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 22:26:55,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:55,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 22:26:55,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1673, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 22:26:55,942 INFO L87 Difference]: Start difference. First operand 1002 states and 1100 transitions. Second operand has 45 states, 45 states have (on average 3.688888888888889) internal successors, (166), 45 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) [2021-12-06 22:26:56,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:56,305 INFO L93 Difference]: Finished difference Result 1118 states and 1216 transitions. [2021-12-06 22:26:56,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 22:26:56,306 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.688888888888889) internal successors, (166), 45 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) Word has length 136 [2021-12-06 22:26:56,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:56,306 INFO L225 Difference]: With dead ends: 1118 [2021-12-06 22:26:56,306 INFO L226 Difference]: Without dead ends: 1030 [2021-12-06 22:26:56,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 22:26:56,307 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 169 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:56,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 339 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:26:56,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-12-06 22:26:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 1018. [2021-12-06 22:26:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 1.0973451327433628) internal successors, (1116), 1017 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:26:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1116 transitions. [2021-12-06 22:26:56,313 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1116 transitions. Word has length 136 [2021-12-06 22:26:56,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:56,313 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1116 transitions. [2021-12-06 22:26:56,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.688888888888889) internal successors, (166), 45 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) [2021-12-06 22:26:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1116 transitions. [2021-12-06 22:26:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 22:26:56,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:56,314 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:56,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-12-06 22:26:56,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:56,515 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:26:56,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:56,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1260835463, now seen corresponding path program 11 times [2021-12-06 22:26:56,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:56,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613608393] [2021-12-06 22:26:56,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:56,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 15 proven. 120 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-12-06 22:26:56,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:56,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613608393] [2021-12-06 22:26:56,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613608393] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:26:56,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533643113] [2021-12-06 22:26:56,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:26:56,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:26:56,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:56,726 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:26:56,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-06 22:26:57,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 22:26:57,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:26:57,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 22:26:57,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:26:57,073 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:26:57,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:26:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 66 proven. 120 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-06 22:26:57,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:26:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 91 proven. 95 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-06 22:26:58,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533643113] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:26:58,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:26:58,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 50 [2021-12-06 22:26:58,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599497828] [2021-12-06 22:26:58,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:26:58,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 22:26:58,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:58,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 22:26:58,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2228, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 22:26:58,316 INFO L87 Difference]: Start difference. First operand 1018 states and 1116 transitions. Second operand has 50 states, 50 states have (on average 5.8) internal successors, (290), 50 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:00,090 INFO L93 Difference]: Finished difference Result 3439 states and 3746 transitions. [2021-12-06 22:27:00,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 22:27:00,090 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.8) internal successors, (290), 50 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) Word has length 140 [2021-12-06 22:27:00,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:00,091 INFO L225 Difference]: With dead ends: 3439 [2021-12-06 22:27:00,091 INFO L226 Difference]: Without dead ends: 1976 [2021-12-06 22:27:00,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1448, Invalid=6384, Unknown=0, NotChecked=0, Total=7832 [2021-12-06 22:27:00,092 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1590 mSDsluCounter, 2404 mSDsCounter, 0 mSdLazyCounter, 2685 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1590 SdHoareTripleChecker+Valid, 2502 SdHoareTripleChecker+Invalid, 2950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 2685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:00,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1590 Valid, 2502 Invalid, 2950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2685 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 22:27:00,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-12-06 22:27:00,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1134. [2021-12-06 22:27:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 1.0979699911738747) internal successors, (1244), 1133 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:00,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1244 transitions. [2021-12-06 22:27:00,106 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1244 transitions. Word has length 140 [2021-12-06 22:27:00,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:00,107 INFO L470 AbstractCegarLoop]: Abstraction has 1134 states and 1244 transitions. [2021-12-06 22:27:00,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.8) internal successors, (290), 50 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:00,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1244 transitions. [2021-12-06 22:27:00,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-06 22:27:00,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:00,108 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:00,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-12-06 22:27:00,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:00,309 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:27:00,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:00,310 INFO L85 PathProgramCache]: Analyzing trace with hash -877524611, now seen corresponding path program 12 times [2021-12-06 22:27:00,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:00,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518069053] [2021-12-06 22:27:00,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:00,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 57 proven. 91 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-06 22:27:00,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:00,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518069053] [2021-12-06 22:27:00,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518069053] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:27:00,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577811374] [2021-12-06 22:27:00,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:27:00,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:00,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:27:00,537 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:27:00,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-06 22:27:01,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 22:27:01,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:27:01,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 22:27:01,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:27:01,189 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:27:01,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:27:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 57 proven. 91 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-06 22:27:01,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:27:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 57 proven. 91 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-06 22:27:01,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577811374] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:27:01,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:27:01,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 50 [2021-12-06 22:27:01,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006890131] [2021-12-06 22:27:01,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:27:01,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 22:27:01,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:01,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 22:27:01,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=2002, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 22:27:01,966 INFO L87 Difference]: Start difference. First operand 1134 states and 1244 transitions. Second operand has 50 states, 50 states have (on average 3.72) internal successors, (186), 50 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:02,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:02,218 INFO L93 Difference]: Finished difference Result 1262 states and 1372 transitions. [2021-12-06 22:27:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 22:27:02,219 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.72) internal successors, (186), 50 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-12-06 22:27:02,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:02,219 INFO L225 Difference]: With dead ends: 1262 [2021-12-06 22:27:02,219 INFO L226 Difference]: Without dead ends: 1162 [2021-12-06 22:27:02,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=745, Invalid=2795, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 22:27:02,220 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 128 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:02,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 401 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:27:02,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-12-06 22:27:02,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1150. [2021-12-06 22:27:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 1.0966057441253263) internal successors, (1260), 1149 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:02,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1260 transitions. [2021-12-06 22:27:02,227 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1260 transitions. Word has length 151 [2021-12-06 22:27:02,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:02,227 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1260 transitions. [2021-12-06 22:27:02,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.72) internal successors, (186), 50 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:02,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1260 transitions. [2021-12-06 22:27:02,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-06 22:27:02,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:02,228 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:02,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-12-06 22:27:02,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:02,429 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:27:02,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:02,430 INFO L85 PathProgramCache]: Analyzing trace with hash -726560512, now seen corresponding path program 13 times [2021-12-06 22:27:02,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:02,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729876707] [2021-12-06 22:27:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:02,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 66 proven. 192 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-06 22:27:02,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:02,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729876707] [2021-12-06 22:27:02,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729876707] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:27:02,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810675898] [2021-12-06 22:27:02,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:27:02,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:02,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:27:02,703 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:27:02,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-12-06 22:27:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:02,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-06 22:27:02,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:27:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 98 proven. 160 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-06 22:27:03,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:27:03,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 22:27:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 98 proven. 160 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-06 22:27:03,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810675898] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:27:03,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:27:03,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 42 [2021-12-06 22:27:03,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375900563] [2021-12-06 22:27:03,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:27:03,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 22:27:03,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:03,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 22:27:03,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 22:27:03,670 INFO L87 Difference]: Start difference. First operand 1150 states and 1260 transitions. Second operand has 43 states, 42 states have (on average 5.571428571428571) internal successors, (234), 43 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:04,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:04,703 INFO L93 Difference]: Finished difference Result 2257 states and 2463 transitions. [2021-12-06 22:27:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:27:04,703 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 5.571428571428571) internal successors, (234), 43 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-12-06 22:27:04,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:04,705 INFO L225 Difference]: With dead ends: 2257 [2021-12-06 22:27:04,705 INFO L226 Difference]: Without dead ends: 2257 [2021-12-06 22:27:04,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=952, Invalid=3604, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 22:27:04,705 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 1586 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:04,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1586 Valid, 1559 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:27:04,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-12-06 22:27:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1254. [2021-12-06 22:27:04,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 1.0981644054269752) internal successors, (1376), 1253 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:04,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1376 transitions. [2021-12-06 22:27:04,717 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1376 transitions. Word has length 155 [2021-12-06 22:27:04,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:04,717 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 1376 transitions. [2021-12-06 22:27:04,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 5.571428571428571) internal successors, (234), 43 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1376 transitions. [2021-12-06 22:27:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-06 22:27:04,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:04,718 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:04,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-12-06 22:27:04,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:04,919 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:27:04,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:04,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1232190210, now seen corresponding path program 14 times [2021-12-06 22:27:04,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:04,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153696973] [2021-12-06 22:27:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:04,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 189 proven. 91 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-06 22:27:05,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:05,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153696973] [2021-12-06 22:27:05,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153696973] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:27:05,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975209191] [2021-12-06 22:27:05,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:27:05,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:05,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:27:05,155 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:27:05,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-12-06 22:27:05,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:27:05,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:27:05,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 22:27:05,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:27:05,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:27:05,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 22:27:05,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:27:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 187 proven. 91 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-12-06 22:27:05,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:27:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 187 proven. 91 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-12-06 22:27:06,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975209191] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:27:06,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:27:06,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 51 [2021-12-06 22:27:06,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38556449] [2021-12-06 22:27:06,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:27:06,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 22:27:06,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:06,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 22:27:06,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2135, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 22:27:06,348 INFO L87 Difference]: Start difference. First operand 1254 states and 1376 transitions. Second operand has 51 states, 51 states have (on average 5.549019607843137) internal successors, (283), 51 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:06,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:06,803 INFO L93 Difference]: Finished difference Result 1981 states and 2156 transitions. [2021-12-06 22:27:06,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 22:27:06,804 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 5.549019607843137) internal successors, (283), 51 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-12-06 22:27:06,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:06,804 INFO L225 Difference]: With dead ends: 1981 [2021-12-06 22:27:06,805 INFO L226 Difference]: Without dead ends: 1192 [2021-12-06 22:27:06,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=726, Invalid=3056, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 22:27:06,805 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 302 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:06,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 1590 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:27:06,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-12-06 22:27:06,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1192. [2021-12-06 22:27:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 1.1007556675062973) internal successors, (1311), 1191 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1311 transitions. [2021-12-06 22:27:06,812 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1311 transitions. Word has length 163 [2021-12-06 22:27:06,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:06,812 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 1311 transitions. [2021-12-06 22:27:06,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.549019607843137) internal successors, (283), 51 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:06,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1311 transitions. [2021-12-06 22:27:06,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-06 22:27:06,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:06,813 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:06,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-12-06 22:27:07,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-12-06 22:27:07,015 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:27:07,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash 851665605, now seen corresponding path program 15 times [2021-12-06 22:27:07,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:07,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674851783] [2021-12-06 22:27:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:07,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:07,238 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 189 proven. 120 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-06 22:27:07,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:07,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674851783] [2021-12-06 22:27:07,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674851783] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:27:07,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024891295] [2021-12-06 22:27:07,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:27:07,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:07,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:27:07,239 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:27:07,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-12-06 22:27:07,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 22:27:07,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:27:07,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 22:27:07,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:27:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 66 proven. 177 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-12-06 22:27:08,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:27:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 66 proven. 177 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-12-06 22:27:08,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024891295] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:27:08,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:27:08,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2021-12-06 22:27:08,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333003731] [2021-12-06 22:27:08,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:27:08,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 22:27:08,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:08,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 22:27:08,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2782, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 22:27:08,708 INFO L87 Difference]: Start difference. First operand 1192 states and 1311 transitions. Second operand has 55 states, 55 states have (on average 5.545454545454546) internal successors, (305), 55 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:11,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:11,051 INFO L93 Difference]: Finished difference Result 3423 states and 3711 transitions. [2021-12-06 22:27:11,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-06 22:27:11,051 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 5.545454545454546) internal successors, (305), 55 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-12-06 22:27:11,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:11,052 INFO L225 Difference]: With dead ends: 3423 [2021-12-06 22:27:11,052 INFO L226 Difference]: Without dead ends: 633 [2021-12-06 22:27:11,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=920, Invalid=8980, Unknown=0, NotChecked=0, Total=9900 [2021-12-06 22:27:11,053 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 1488 mSDsluCounter, 4184 mSDsCounter, 0 mSdLazyCounter, 3595 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1488 SdHoareTripleChecker+Valid, 4303 SdHoareTripleChecker+Invalid, 3750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 3595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:11,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1488 Valid, 4303 Invalid, 3750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 3595 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 22:27:11,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-12-06 22:27:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 631. [2021-12-06 22:27:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 1.0984126984126985) internal successors, (692), 630 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:11,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 692 transitions. [2021-12-06 22:27:11,057 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 692 transitions. Word has length 167 [2021-12-06 22:27:11,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:11,057 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 692 transitions. [2021-12-06 22:27:11,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 5.545454545454546) internal successors, (305), 55 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:11,057 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 692 transitions. [2021-12-06 22:27:11,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-06 22:27:11,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:11,058 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:11,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-12-06 22:27:11,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:11,259 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:27:11,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:11,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1395757844, now seen corresponding path program 16 times [2021-12-06 22:27:11,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:11,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523197520] [2021-12-06 22:27:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:11,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 77 proven. 120 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-06 22:27:11,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:11,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523197520] [2021-12-06 22:27:11,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523197520] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:27:11,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306180652] [2021-12-06 22:27:11,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:27:11,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:11,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:27:11,482 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:27:11,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-12-06 22:27:11,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:27:11,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:27:11,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 22:27:11,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:27:11,662 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:27:11,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:27:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 77 proven. 120 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-06 22:27:12,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:27:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 77 proven. 120 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-12-06 22:27:12,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306180652] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:27:12,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:27:12,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 56 [2021-12-06 22:27:12,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807110623] [2021-12-06 22:27:12,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:27:12,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 22:27:12,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:12,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 22:27:12,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=2547, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 22:27:12,420 INFO L87 Difference]: Start difference. First operand 631 states and 692 transitions. Second operand has 56 states, 56 states have (on average 3.607142857142857) internal successors, (202), 56 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:12,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:12,740 INFO L93 Difference]: Finished difference Result 701 states and 762 transitions. [2021-12-06 22:27:12,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 22:27:12,740 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.607142857142857) internal successors, (202), 56 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) Word has length 174 [2021-12-06 22:27:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:12,741 INFO L225 Difference]: With dead ends: 701 [2021-12-06 22:27:12,741 INFO L226 Difference]: Without dead ends: 645 [2021-12-06 22:27:12,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=887, Invalid=3535, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 22:27:12,742 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 135 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:12,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 479 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:27:12,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-12-06 22:27:12,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 639. [2021-12-06 22:27:12,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 1.09717868338558) internal successors, (700), 638 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:12,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 700 transitions. [2021-12-06 22:27:12,746 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 700 transitions. Word has length 174 [2021-12-06 22:27:12,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:12,746 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 700 transitions. [2021-12-06 22:27:12,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.607142857142857) internal successors, (202), 56 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:12,746 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 700 transitions. [2021-12-06 22:27:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-06 22:27:12,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:12,747 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:12,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-12-06 22:27:12,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:12,948 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:27:12,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:12,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1712912335, now seen corresponding path program 17 times [2021-12-06 22:27:12,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:12,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626981185] [2021-12-06 22:27:12,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:12,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 21 proven. 245 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-12-06 22:27:13,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:13,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626981185] [2021-12-06 22:27:13,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626981185] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:27:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174160831] [2021-12-06 22:27:13,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:27:13,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:13,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:27:13,207 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:27:13,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-12-06 22:27:13,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 22:27:13,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:27:13,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-06 22:27:13,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:27:13,844 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:27:13,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:27:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 120 proven. 222 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-12-06 22:27:14,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:27:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 153 proven. 189 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-12-06 22:27:15,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174160831] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:27:15,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:27:15,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 62 [2021-12-06 22:27:15,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198110623] [2021-12-06 22:27:15,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:27:15,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-06 22:27:15,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:15,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-06 22:27:15,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=3466, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 22:27:15,635 INFO L87 Difference]: Start difference. First operand 639 states and 700 transitions. Second operand has 62 states, 62 states have (on average 5.806451612903226) internal successors, (360), 62 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:18,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:18,122 INFO L93 Difference]: Finished difference Result 2318 states and 2535 transitions. [2021-12-06 22:27:18,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-06 22:27:18,122 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 5.806451612903226) internal successors, (360), 62 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have 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 [2021-12-06 22:27:18,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:18,123 INFO L225 Difference]: With dead ends: 2318 [2021-12-06 22:27:18,123 INFO L226 Difference]: Without dead ends: 1310 [2021-12-06 22:27:18,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1603 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2177, Invalid=10479, Unknown=0, NotChecked=0, Total=12656 [2021-12-06 22:27:18,124 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 3296 mSDsluCounter, 3607 mSDsCounter, 0 mSdLazyCounter, 3939 mSolverCounterSat, 560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3296 SdHoareTripleChecker+Valid, 3735 SdHoareTripleChecker+Invalid, 4499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 560 IncrementalHoareTripleChecker+Valid, 3939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:18,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3296 Valid, 3735 Invalid, 4499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [560 Valid, 3939 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 22:27:18,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-12-06 22:27:18,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 693. [2021-12-06 22:27:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 1.0982658959537572) internal successors, (760), 692 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:18,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 760 transitions. [2021-12-06 22:27:18,131 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 760 transitions. Word has length 178 [2021-12-06 22:27:18,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:18,131 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 760 transitions. [2021-12-06 22:27:18,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 5.806451612903226) internal successors, (360), 62 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:18,131 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 760 transitions. [2021-12-06 22:27:18,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-06 22:27:18,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:18,132 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:18,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-12-06 22:27:18,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:18,333 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 22:27:18,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:18,334 INFO L85 PathProgramCache]: Analyzing trace with hash -716837299, now seen corresponding path program 18 times [2021-12-06 22:27:18,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:18,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504750547] [2021-12-06 22:27:18,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:18,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 100 proven. 153 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2021-12-06 22:27:18,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:18,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504750547] [2021-12-06 22:27:18,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504750547] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:27:18,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127164260] [2021-12-06 22:27:18,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:27:18,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:18,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:27:18,587 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:27:18,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-12-06 22:27:20,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-06 22:27:20,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:27:20,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-06 22:27:20,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:27:20,878 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:27:20,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 22:27:21,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 22:27:21,236 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-12-06 22:27:21,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 36 [2021-12-06 22:27:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 28 proven. 45 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2021-12-06 22:27:21,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:27:30,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:27:30,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 103 [2021-12-06 22:27:30,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-12-06 22:27:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 104 refuted. 44 times theorem prover too weak. 506 trivial. 0 not checked. [2021-12-06 22:27:31,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127164260] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:27:31,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:27:31,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 12, 14] total 49 [2021-12-06 22:27:31,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284099822] [2021-12-06 22:27:31,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:27:31,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 22:27:31,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:31,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 22:27:31,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2105, Unknown=5, NotChecked=0, Total=2352 [2021-12-06 22:27:31,418 INFO L87 Difference]: Start difference. First operand 693 states and 760 transitions. Second operand has 49 states, 49 states have (on average 4.244897959183674) internal successors, (208), 49 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:32,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:32,345 INFO L93 Difference]: Finished difference Result 829 states and 898 transitions. [2021-12-06 22:27:32,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 22:27:32,345 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.244897959183674) internal successors, (208), 49 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-12-06 22:27:32,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:32,345 INFO L225 Difference]: With dead ends: 829 [2021-12-06 22:27:32,346 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 22:27:32,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=705, Invalid=4990, Unknown=5, NotChecked=0, Total=5700 [2021-12-06 22:27:32,346 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 227 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:32,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 869 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 848 Invalid, 0 Unknown, 169 Unchecked, 0.3s Time] [2021-12-06 22:27:32,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 22:27:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 22:27:32,347 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) [2021-12-06 22:27:32,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 22:27:32,347 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 189 [2021-12-06 22:27:32,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:32,347 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 22:27:32,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.244897959183674) internal successors, (208), 49 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:27:32,347 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 22:27:32,347 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 22:27:32,349 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (24 of 25 remaining) [2021-12-06 22:27:32,349 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (23 of 25 remaining) [2021-12-06 22:27:32,349 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (22 of 25 remaining) [2021-12-06 22:27:32,349 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (21 of 25 remaining) [2021-12-06 22:27:32,349 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (20 of 25 remaining) [2021-12-06 22:27:32,349 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (19 of 25 remaining) [2021-12-06 22:27:32,349 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (18 of 25 remaining) [2021-12-06 22:27:32,349 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (17 of 25 remaining) [2021-12-06 22:27:32,349 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (16 of 25 remaining) [2021-12-06 22:27:32,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (15 of 25 remaining) [2021-12-06 22:27:32,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION (14 of 25 remaining) [2021-12-06 22:27:32,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATION (13 of 25 remaining) [2021-12-06 22:27:32,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATION (12 of 25 remaining) [2021-12-06 22:27:32,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATION (11 of 25 remaining) [2021-12-06 22:27:32,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATION (10 of 25 remaining) [2021-12-06 22:27:32,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATION (9 of 25 remaining) [2021-12-06 22:27:32,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATION (8 of 25 remaining) [2021-12-06 22:27:32,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATION (7 of 25 remaining) [2021-12-06 22:27:32,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18REQUIRES_VIOLATION (6 of 25 remaining) [2021-12-06 22:27:32,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19REQUIRES_VIOLATION (5 of 25 remaining) [2021-12-06 22:27:32,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20REQUIRES_VIOLATION (4 of 25 remaining) [2021-12-06 22:27:32,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21REQUIRES_VIOLATION (3 of 25 remaining) [2021-12-06 22:27:32,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr22REQUIRES_VIOLATION (2 of 25 remaining) [2021-12-06 22:27:32,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr23REQUIRES_VIOLATION (1 of 25 remaining) [2021-12-06 22:27:32,351 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK (0 of 25 remaining) [2021-12-06 22:27:32,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-12-06 22:27:32,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:27:32,557 INFO L732 BasicCegarLoop]: Path program histogram: [18, 17, 9, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:32,558 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 22:27:32,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 10:27:32 BoogieIcfgContainer [2021-12-06 22:27:32,560 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 22:27:32,561 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 22:27:32,561 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 22:27:32,561 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 22:27:32,561 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:23:36" (3/4) ... [2021-12-06 22:27:32,564 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-06 22:27:32,574 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-12-06 22:27:32,574 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-06 22:27:32,574 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-06 22:27:32,574 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-06 22:27:32,601 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 22:27:32,601 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 22:27:32,601 INFO L158 Benchmark]: Toolchain (without parser) took 236967.71ms. Allocated memory was 115.3MB in the beginning and 673.2MB in the end (delta: 557.8MB). Free memory was 75.2MB in the beginning and 202.5MB in the end (delta: -127.3MB). Peak memory consumption was 428.9MB. Max. memory is 16.1GB. [2021-12-06 22:27:32,601 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 115.3MB. Free memory is still 93.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 22:27:32,601 INFO L158 Benchmark]: CACSL2BoogieTranslator took 328.57ms. Allocated memory is still 115.3MB. Free memory was 75.1MB in the beginning and 81.2MB in the end (delta: -6.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 22:27:32,601 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.16ms. Allocated memory is still 115.3MB. Free memory was 81.2MB in the beginning and 79.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 22:27:32,601 INFO L158 Benchmark]: Boogie Preprocessor took 29.71ms. Allocated memory is still 115.3MB. Free memory was 79.1MB in the beginning and 77.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 22:27:32,602 INFO L158 Benchmark]: RCFGBuilder took 357.14ms. Allocated memory is still 115.3MB. Free memory was 77.5MB in the beginning and 61.7MB in the end (delta: 15.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-06 22:27:32,602 INFO L158 Benchmark]: TraceAbstraction took 236160.36ms. Allocated memory was 115.3MB in the beginning and 673.2MB in the end (delta: 557.8MB). Free memory was 61.2MB in the beginning and 205.2MB in the end (delta: -144.0MB). Peak memory consumption was 416.5MB. Max. memory is 16.1GB. [2021-12-06 22:27:32,602 INFO L158 Benchmark]: Witness Printer took 40.05ms. Allocated memory is still 673.2MB. Free memory was 205.2MB in the beginning and 202.5MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 22:27:32,602 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 115.3MB. Free memory is still 93.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 328.57ms. Allocated memory is still 115.3MB. Free memory was 75.1MB in the beginning and 81.2MB in the end (delta: -6.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.16ms. Allocated memory is still 115.3MB. Free memory was 81.2MB in the beginning and 79.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.71ms. Allocated memory is still 115.3MB. Free memory was 79.1MB in the beginning and 77.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 357.14ms. Allocated memory is still 115.3MB. Free memory was 77.5MB in the beginning and 61.7MB in the end (delta: 15.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 236160.36ms. Allocated memory was 115.3MB in the beginning and 673.2MB in the end (delta: 557.8MB). Free memory was 61.2MB in the beginning and 205.2MB in the end (delta: -144.0MB). Peak memory consumption was 416.5MB. Max. memory is 16.1GB. * Witness Printer took 40.05ms. Allocated memory is still 673.2MB. Free memory was 205.2MB in the beginning and 202.5MB in the end (delta: 2.7MB). 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: 566]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 566]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 570]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 570]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 573]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 573]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 574]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 574]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 540]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 540]: 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: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 528]: 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: 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: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: 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, 79 locations, 25 error locations. Started 1 CEGAR loops. OverallTime: 236.1s, OverallIterations: 98, TraceHistogramMax: 10, PathProgramHistogramMax: 18, EmptinessCheckTime: 0.1s, AutomataDifference: 85.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 55548 SdHoareTripleChecker+Valid, 28.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 55548 mSDsluCounter, 153879 SdHoareTripleChecker+Invalid, 24.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 13985 IncrementalHoareTripleChecker+Unchecked, 144817 mSDsCounter, 4141 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 91627 IncrementalHoareTripleChecker+Invalid, 109753 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4141 mSolverCounterUnsat, 9062 mSDtfsCounter, 91627 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 16341 GetRequests, 11372 SyntacticMatches, 106 SemanticMatches, 4863 ConstructedPredicates, 15 IntricatePredicates, 13 DeprecatedPredicates, 78049 ImplicationChecksByTransitivity, 109.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8709occurred in iteration=78, InterpolantAutomatonStates: 2540, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 98 MinimizatonAttempts, 49407 StatesRemovedByMinimization, 86 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 8.6s SatisfiabilityAnalysisTime, 115.9s InterpolantComputationTime, 13923 NumberOfCodeBlocks, 13594 NumberOfCodeBlocksAsserted, 325 NumberOfCheckSat, 20138 ConstructedInterpolants, 1563 QuantifiedInterpolants, 242844 SizeOfPredicates, 1901 NumberOfNonLiveVariables, 30037 ConjunctsInSsa, 5048 ConjunctsInUnsatCore, 253 InterpolantComputations, 27 PerfectInterpolantSequences, 18713/32141 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 25 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-06 22:27:32,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_762836e5-e95f-4b8e-9879-8efeb56c0d90/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE