./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-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_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/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_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/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_31277bd8-5c28-4127-a92f-6638954185d6/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 8688e0efa9d37c2205606fbd307da42d83b0f0e2936dd15336b8b67e136d86b0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:34:48,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:34:48,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:34:48,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:34:48,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:34:48,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:34:48,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:34:48,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:34:48,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:34:48,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:34:48,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:34:48,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:34:48,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:34:48,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:34:48,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:34:48,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:34:48,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:34:48,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:34:48,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:34:48,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:34:48,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:34:48,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:34:48,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:34:48,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:34:48,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:34:48,898 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:34:48,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:34:48,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:34:48,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:34:48,900 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:34:48,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:34:48,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:34:48,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:34:48,902 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:34:48,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:34:48,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:34:48,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:34:48,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:34:48,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:34:48,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:34:48,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:34:48,907 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 17:34:48,924 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:34:48,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:34:48,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:34:48,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:34:48,925 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:34:48,925 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:34:48,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:34:48,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:34:48,926 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:34:48,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:34:48,926 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:34:48,926 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 17:34:48,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:34:48,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:34:48,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:34:48,927 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 17:34:48,927 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 17:34:48,927 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 17:34:48,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:34:48,927 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 17:34:48,927 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:34:48,927 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:34:48,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:34:48,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:34:48,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:34:48,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:34:48,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:34:48,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:34:48,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:34:48,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:34:48,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:34:48,929 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_31277bd8-5c28-4127-a92f-6638954185d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8688e0efa9d37c2205606fbd307da42d83b0f0e2936dd15336b8b67e136d86b0 [2021-12-06 17:34:49,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:34:49,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:34:49,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:34:49,128 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:34:49,129 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:34:49,129 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2021-12-06 17:34:49,176 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/data/1552b408f/bfcaadf5f5694b8d87210d191befc35f/FLAG1d88a16f0 [2021-12-06 17:34:49,567 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:34:49,568 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2021-12-06 17:34:49,577 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/data/1552b408f/bfcaadf5f5694b8d87210d191befc35f/FLAG1d88a16f0 [2021-12-06 17:34:49,586 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/data/1552b408f/bfcaadf5f5694b8d87210d191befc35f [2021-12-06 17:34:49,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:34:49,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:34:49,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:34:49,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:34:49,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:34:49,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:34:49" (1/1) ... [2021-12-06 17:34:49,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dcb2bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:49, skipping insertion in model container [2021-12-06 17:34:49,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:34:49" (1/1) ... [2021-12-06 17:34:49,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:34:49,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:34:49,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:34:49,837 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:34:49,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:34:49,884 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:34:49,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:49 WrapperNode [2021-12-06 17:34:49,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:34:49,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:34:49,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:34:49,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:34:49,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:49" (1/1) ... [2021-12-06 17:34:49,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:49" (1/1) ... [2021-12-06 17:34:49,916 INFO L137 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2021-12-06 17:34:49,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:34:49,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:34:49,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:34:49,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:34:49,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:49" (1/1) ... [2021-12-06 17:34:49,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:49" (1/1) ... [2021-12-06 17:34:49,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:49" (1/1) ... [2021-12-06 17:34:49,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:49" (1/1) ... [2021-12-06 17:34:49,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:49" (1/1) ... [2021-12-06 17:34:49,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:49" (1/1) ... [2021-12-06 17:34:49,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:49" (1/1) ... [2021-12-06 17:34:49,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:34:49,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:34:49,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:34:49,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:34:49,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:49" (1/1) ... [2021-12-06 17:34:49,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:34:49,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:34:49,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:34:49,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:34:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 17:34:50,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 17:34:50,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 17:34:50,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:34:50,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:34:50,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:34:50,078 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:34:50,080 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:34:50,230 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:34:50,235 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:34:50,235 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 17:34:50,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:34:50 BoogieIcfgContainer [2021-12-06 17:34:50,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:34:50,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:34:50,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:34:50,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:34:50,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:34:49" (1/3) ... [2021-12-06 17:34:50,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c9cf0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:34:50, skipping insertion in model container [2021-12-06 17:34:50,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:34:49" (2/3) ... [2021-12-06 17:34:50,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c9cf0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:34:50, skipping insertion in model container [2021-12-06 17:34:50,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:34:50" (3/3) ... [2021-12-06 17:34:50,243 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcat-alloca-2.i [2021-12-06 17:34:50,247 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:34:50,248 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-12-06 17:34:50,282 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:34:50,287 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 17:34:50,287 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-12-06 17:34:50,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 44 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 17:34:50,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 17:34:50,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:50,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:50,304 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:50,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031099, now seen corresponding path program 1 times [2021-12-06 17:34:50,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:50,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719318712] [2021-12-06 17:34:50,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:50,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:50,450 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 17:34:50,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:50,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719318712] [2021-12-06 17:34:50,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719318712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:50,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:50,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:34:50,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780425266] [2021-12-06 17:34:50,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:50,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:34:50,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:50,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:34:50,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:34:50,478 INFO L87 Difference]: Start difference. First operand has 45 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 44 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) Second operand has 5 states, 5 states have (on average 1.4) 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 17:34:50,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:50,583 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2021-12-06 17:34:50,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:34:50,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) 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 17:34:50,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:50,591 INFO L225 Difference]: With dead ends: 127 [2021-12-06 17:34:50,592 INFO L226 Difference]: Without dead ends: 121 [2021-12-06 17:34:50,593 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 17:34:50,597 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 217 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:50,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 164 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:34:50,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-06 17:34:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 46. [2021-12-06 17:34:50,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-06 17:34:50,628 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 7 [2021-12-06 17:34:50,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:50,629 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-06 17:34:50,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) 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 17:34:50,629 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-06 17:34:50,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 17:34:50,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:50,629 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:50,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:34:50,630 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:50,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033021, now seen corresponding path program 1 times [2021-12-06 17:34:50,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:50,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764891684] [2021-12-06 17:34:50,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:50,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:50,656 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 17:34:50,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:50,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764891684] [2021-12-06 17:34:50,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764891684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:50,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:50,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:34:50,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781157314] [2021-12-06 17:34:50,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:50,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:34:50,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:50,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:34:50,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:34:50,658 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:50,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:50,676 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-12-06 17:34:50,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:34:50,676 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 17:34:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:50,677 INFO L225 Difference]: With dead ends: 47 [2021-12-06 17:34:50,677 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 17:34:50,677 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 17:34:50,678 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:50,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 73 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 17:34:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-12-06 17:34:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.75) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-12-06 17:34:50,683 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 7 [2021-12-06 17:34:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:50,683 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-12-06 17:34:50,683 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 17:34:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-12-06 17:34:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 17:34:50,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:50,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:50,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:34:50,684 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:50,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:50,684 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2021-12-06 17:34:50,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:50,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741080085] [2021-12-06 17:34:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:50,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:50,725 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 17:34:50,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:50,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741080085] [2021-12-06 17:34:50,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741080085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:50,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:50,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:34:50,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668502604] [2021-12-06 17:34:50,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:50,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:34:50,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:50,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:34:50,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:34:50,728 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:50,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:50,752 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-12-06 17:34:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:34:50,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 17:34:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:50,754 INFO L225 Difference]: With dead ends: 78 [2021-12-06 17:34:50,754 INFO L226 Difference]: Without dead ends: 78 [2021-12-06 17:34:50,754 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 17:34:50,756 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 37 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:50,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:50,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-06 17:34:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-12-06 17:34:50,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.71875) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:50,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-06 17:34:50,763 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2021-12-06 17:34:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:50,763 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-06 17:34:50,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-06 17:34:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 17:34:50,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:50,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:50,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:34:50,764 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:50,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:50,765 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2021-12-06 17:34:50,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:50,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176468054] [2021-12-06 17:34:50,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:50,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:50,813 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 17:34:50,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:50,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176468054] [2021-12-06 17:34:50,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176468054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:50,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:50,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:34:50,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822978010] [2021-12-06 17:34:50,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:50,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:34:50,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:50,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:34:50,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:34:50,815 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:50,859 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2021-12-06 17:34:50,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:34:50,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 17:34:50,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:50,860 INFO L225 Difference]: With dead ends: 84 [2021-12-06 17:34:50,860 INFO L226 Difference]: Without dead ends: 84 [2021-12-06 17:34:50,860 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 17:34:50,861 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 106 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:50,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 163 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-06 17:34:50,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 47. [2021-12-06 17:34:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.71875) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-06 17:34:50,866 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2021-12-06 17:34:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:50,866 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-06 17:34:50,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-06 17:34:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 17:34:50,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:50,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:50,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 17:34:50,867 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:50,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:50,868 INFO L85 PathProgramCache]: Analyzing trace with hash 180494259, now seen corresponding path program 1 times [2021-12-06 17:34:50,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:50,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70188667] [2021-12-06 17:34:50,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:50,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:50,912 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 17:34:50,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:50,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70188667] [2021-12-06 17:34:50,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70188667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:50,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:50,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:34:50,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833227438] [2021-12-06 17:34:50,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:50,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:34:50,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:50,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:34:50,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:34:50,915 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:50,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:50,934 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-12-06 17:34:50,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:34:50,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 17:34:50,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:50,935 INFO L225 Difference]: With dead ends: 45 [2021-12-06 17:34:50,935 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 17:34:50,936 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 17:34:50,937 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:50,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 37 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:50,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 17:34:50,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-06 17:34:50,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.65625) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-12-06 17:34:50,943 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 8 [2021-12-06 17:34:50,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:50,943 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-12-06 17:34:50,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-12-06 17:34:50,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 17:34:50,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:50,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:50,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:34:50,944 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:50,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:50,945 INFO L85 PathProgramCache]: Analyzing trace with hash 180494260, now seen corresponding path program 1 times [2021-12-06 17:34:50,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:50,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596338107] [2021-12-06 17:34:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:50,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:50,994 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 17:34:50,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:50,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596338107] [2021-12-06 17:34:50,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596338107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:50,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:50,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:34:50,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540323549] [2021-12-06 17:34:50,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:50,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:34:50,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:50,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:34:50,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:34:50,996 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:51,044 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2021-12-06 17:34:51,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:34:51,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 17:34:51,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:51,045 INFO L225 Difference]: With dead ends: 79 [2021-12-06 17:34:51,045 INFO L226 Difference]: Without dead ends: 79 [2021-12-06 17:34:51,046 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 17:34:51,047 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 38 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:51,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 82 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:51,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-06 17:34:51,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2021-12-06 17:34:51,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 46 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 17:34:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-12-06 17:34:51,052 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 8 [2021-12-06 17:34:51,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:51,053 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-12-06 17:34:51,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,053 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-12-06 17:34:51,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 17:34:51,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:51,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:51,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 17:34:51,054 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:51,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:51,054 INFO L85 PathProgramCache]: Analyzing trace with hash 690580011, now seen corresponding path program 1 times [2021-12-06 17:34:51,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:51,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428977745] [2021-12-06 17:34:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:51,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,101 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 17:34:51,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:51,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428977745] [2021-12-06 17:34:51,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428977745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:51,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:51,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:34:51,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394072886] [2021-12-06 17:34:51,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:51,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:34:51,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:51,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:34:51,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:34:51,106 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:51,124 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-12-06 17:34:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:34:51,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 17:34:51,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:51,125 INFO L225 Difference]: With dead ends: 46 [2021-12-06 17:34:51,125 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 17:34:51,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:34:51,126 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:51,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:51,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 17:34:51,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-06 17:34:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-06 17:34:51,131 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2021-12-06 17:34:51,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:51,131 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-06 17:34:51,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-06 17:34:51,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 17:34:51,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:51,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:51,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 17:34:51,132 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:51,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:51,133 INFO L85 PathProgramCache]: Analyzing trace with hash 690580063, now seen corresponding path program 1 times [2021-12-06 17:34:51,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:51,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457312557] [2021-12-06 17:34:51,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:51,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,165 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 17:34:51,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:51,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457312557] [2021-12-06 17:34:51,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457312557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:51,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:51,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:34:51,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109490608] [2021-12-06 17:34:51,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:51,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:34:51,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:51,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:34:51,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:34:51,168 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:51,180 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2021-12-06 17:34:51,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:34:51,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 17:34:51,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:51,181 INFO L225 Difference]: With dead ends: 80 [2021-12-06 17:34:51,181 INFO L226 Difference]: Without dead ends: 80 [2021-12-06 17:34:51,181 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 17:34:51,182 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 54 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:51,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 86 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:51,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-06 17:34:51,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2021-12-06 17:34:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-12-06 17:34:51,188 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 10 [2021-12-06 17:34:51,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:51,188 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-12-06 17:34:51,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,189 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-12-06 17:34:51,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 17:34:51,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:51,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:51,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 17:34:51,190 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:51,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:51,190 INFO L85 PathProgramCache]: Analyzing trace with hash 747838365, now seen corresponding path program 1 times [2021-12-06 17:34:51,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:51,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078296560] [2021-12-06 17:34:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:51,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,214 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 17:34:51,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:51,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078296560] [2021-12-06 17:34:51,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078296560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:51,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:51,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:34:51,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680093339] [2021-12-06 17:34:51,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:51,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:34:51,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:51,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:34:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:34:51,216 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:51,230 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-12-06 17:34:51,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:34:51,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 17:34:51,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:51,231 INFO L225 Difference]: With dead ends: 55 [2021-12-06 17:34:51,231 INFO L226 Difference]: Without dead ends: 55 [2021-12-06 17:34:51,231 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 17:34:51,232 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:51,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:51,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-06 17:34:51,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-12-06 17:34:51,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.488888888888889) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-12-06 17:34:51,235 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 10 [2021-12-06 17:34:51,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:51,235 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-12-06 17:34:51,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,236 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-12-06 17:34:51,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 17:34:51,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:51,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:51,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 17:34:51,236 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:51,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:51,237 INFO L85 PathProgramCache]: Analyzing trace with hash 747838366, now seen corresponding path program 1 times [2021-12-06 17:34:51,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:51,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527579788] [2021-12-06 17:34:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:51,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,270 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 17:34:51,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:51,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527579788] [2021-12-06 17:34:51,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527579788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:51,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:51,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:34:51,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987281217] [2021-12-06 17:34:51,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:51,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:34:51,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:51,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:34:51,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:34:51,272 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:51,321 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2021-12-06 17:34:51,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:34:51,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 17:34:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:51,322 INFO L225 Difference]: With dead ends: 107 [2021-12-06 17:34:51,322 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 17:34:51,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:34:51,323 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 228 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:51,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 107 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:51,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 17:34:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 56. [2021-12-06 17:34:51,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.5) internal successors, (69), 55 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2021-12-06 17:34:51,327 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 10 [2021-12-06 17:34:51,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:51,327 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2021-12-06 17:34:51,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2021-12-06 17:34:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 17:34:51,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:51,328 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:51,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 17:34:51,328 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:51,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:51,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1772121568, now seen corresponding path program 1 times [2021-12-06 17:34:51,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:51,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102427047] [2021-12-06 17:34:51,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:51,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,376 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 17:34:51,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:51,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102427047] [2021-12-06 17:34:51,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102427047] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:51,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:51,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:34:51,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475551643] [2021-12-06 17:34:51,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:51,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:34:51,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:51,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:34:51,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:34:51,377 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:51,437 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2021-12-06 17:34:51,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:34:51,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 17:34:51,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:51,439 INFO L225 Difference]: With dead ends: 81 [2021-12-06 17:34:51,439 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 17:34:51,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:34:51,440 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 152 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:51,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 67 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:51,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 17:34:51,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2021-12-06 17:34:51,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.5) internal successors, (72), 57 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2021-12-06 17:34:51,445 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 10 [2021-12-06 17:34:51,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:51,445 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2021-12-06 17:34:51,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,445 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2021-12-06 17:34:51,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:34:51,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:51,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:51,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 17:34:51,446 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:51,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:51,447 INFO L85 PathProgramCache]: Analyzing trace with hash -66856135, now seen corresponding path program 1 times [2021-12-06 17:34:51,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:51,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837789986] [2021-12-06 17:34:51,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:51,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,489 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 17:34:51,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:51,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837789986] [2021-12-06 17:34:51,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837789986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:51,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:51,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:34:51,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868603879] [2021-12-06 17:34:51,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:51,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:34:51,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:51,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:34:51,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:34:51,490 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 5 states, 4 states have (on average 2.75) 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 17:34:51,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:51,525 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2021-12-06 17:34:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:34:51,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) 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 17:34:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:51,526 INFO L225 Difference]: With dead ends: 83 [2021-12-06 17:34:51,526 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 17:34:51,526 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 17:34:51,527 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 123 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:51,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 89 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 17:34:51,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-12-06 17:34:51,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2021-12-06 17:34:51,530 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 11 [2021-12-06 17:34:51,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:51,530 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2021-12-06 17:34:51,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) 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 17:34:51,531 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2021-12-06 17:34:51,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:34:51,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:51,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:51,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 17:34:51,532 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:51,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:51,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1708151227, now seen corresponding path program 1 times [2021-12-06 17:34:51,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:51,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391901559] [2021-12-06 17:34:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:51,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,581 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 17:34:51,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:51,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391901559] [2021-12-06 17:34:51,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391901559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:51,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:51,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:34:51,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684819353] [2021-12-06 17:34:51,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:51,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:34:51,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:51,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:34:51,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:34:51,583 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 5 states, 4 states have (on average 2.75) 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 17:34:51,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:51,611 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2021-12-06 17:34:51,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:34:51,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) 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 17:34:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:51,612 INFO L225 Difference]: With dead ends: 63 [2021-12-06 17:34:51,612 INFO L226 Difference]: Without dead ends: 63 [2021-12-06 17:34:51,612 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 17:34:51,612 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:51,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 33 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:51,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-06 17:34:51,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2021-12-06 17:34:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 56 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-12-06 17:34:51,615 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 11 [2021-12-06 17:34:51,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:51,615 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-12-06 17:34:51,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) 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 17:34:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-12-06 17:34:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 17:34:51,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:51,616 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:51,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 17:34:51,616 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:51,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:51,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1736941833, now seen corresponding path program 1 times [2021-12-06 17:34:51,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:51,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664708778] [2021-12-06 17:34:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:51,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,661 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 17:34:51,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:51,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664708778] [2021-12-06 17:34:51,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664708778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:34:51,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693011893] [2021-12-06 17:34:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:51,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:34:51,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:34:51,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:34:51,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:34:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:51,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:34:51,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:34:51,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:34:51,772 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 17:34:51,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:34:51,835 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 17:34:51,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:34:51,963 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 17:34:51,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693011893] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:34:51,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:34:51,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-06 17:34:51,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927893799] [2021-12-06 17:34:51,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:34:51,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:34:51,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:51,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:34:51,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:34:51,965 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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 17:34:52,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:52,064 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2021-12-06 17:34:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:34:52,065 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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 12 [2021-12-06 17:34:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:52,065 INFO L225 Difference]: With dead ends: 122 [2021-12-06 17:34:52,065 INFO L226 Difference]: Without dead ends: 122 [2021-12-06 17:34:52,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:34:52,066 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 266 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:52,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 184 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:34:52,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-06 17:34:52,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 52. [2021-12-06 17:34:52,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:52,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-12-06 17:34:52,069 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 12 [2021-12-06 17:34:52,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:52,069 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-12-06 17:34:52,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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 17:34:52,069 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-12-06 17:34:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 17:34:52,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:52,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:52,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:34:52,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 17:34:52,270 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:52,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:52,271 INFO L85 PathProgramCache]: Analyzing trace with hash 175763932, now seen corresponding path program 1 times [2021-12-06 17:34:52,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:52,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795078484] [2021-12-06 17:34:52,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:52,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:52,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:52,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795078484] [2021-12-06 17:34:52,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795078484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:52,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:52,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:34:52,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503147100] [2021-12-06 17:34:52,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:52,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:34:52,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:52,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:34:52,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:34:52,297 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:52,319 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-12-06 17:34:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:34:52,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 17:34:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:52,320 INFO L225 Difference]: With dead ends: 51 [2021-12-06 17:34:52,320 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 17:34:52,320 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 17:34:52,321 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 40 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:52,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 47 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:52,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 17:34:52,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-06 17:34:52,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-12-06 17:34:52,323 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 13 [2021-12-06 17:34:52,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:52,323 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-12-06 17:34:52,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:52,323 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-12-06 17:34:52,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 17:34:52,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:52,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:52,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 17:34:52,324 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:52,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:52,324 INFO L85 PathProgramCache]: Analyzing trace with hash 175763933, now seen corresponding path program 1 times [2021-12-06 17:34:52,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:52,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248404641] [2021-12-06 17:34:52,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:52,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:52,363 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 17:34:52,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:52,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248404641] [2021-12-06 17:34:52,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248404641] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:52,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:52,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:34:52,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200327381] [2021-12-06 17:34:52,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:52,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:34:52,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:52,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:34:52,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:34:52,364 INFO L87 Difference]: Start difference. First operand 51 states and 62 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 17:34:52,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:52,399 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-12-06 17:34:52,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:34:52,399 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 17:34:52,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:52,399 INFO L225 Difference]: With dead ends: 55 [2021-12-06 17:34:52,399 INFO L226 Difference]: Without dead ends: 55 [2021-12-06 17:34:52,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:34:52,400 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 73 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:52,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 65 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:52,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-06 17:34:52,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-12-06 17:34:52,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.4) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:52,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-12-06 17:34:52,402 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 13 [2021-12-06 17:34:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:52,402 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-12-06 17:34:52,402 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 17:34:52,402 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-12-06 17:34:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:34:52,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:52,403 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:52,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 17:34:52,403 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:52,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1510420451, now seen corresponding path program 1 times [2021-12-06 17:34:52,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:52,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174216934] [2021-12-06 17:34:52,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:52,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:52,465 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 17:34:52,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:52,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174216934] [2021-12-06 17:34:52,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174216934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:34:52,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074024112] [2021-12-06 17:34:52,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:52,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:34:52,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:34:52,466 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:34:52,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:34:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:52,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:34:52,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:34:52,533 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:34:52,533 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 17:34:52,591 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 17:34:52,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:34:52,730 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 17:34:52,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074024112] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:34:52,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:34:52,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-06 17:34:52,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913699615] [2021-12-06 17:34:52,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:34:52,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:34:52,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:52,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:34:52,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:34:52,731 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:52,882 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2021-12-06 17:34:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:34:52,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 17:34:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:52,883 INFO L225 Difference]: With dead ends: 95 [2021-12-06 17:34:52,883 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 17:34:52,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-12-06 17:34:52,884 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 156 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:52,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 164 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:34:52,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 17:34:52,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 49. [2021-12-06 17:34:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.372093023255814) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:52,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-12-06 17:34:52,887 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 14 [2021-12-06 17:34:52,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:52,888 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-12-06 17:34:52,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:52,888 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-12-06 17:34:52,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 17:34:52,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:52,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:52,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:34:53,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 17:34:53,090 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:53,091 INFO L85 PathProgramCache]: Analyzing trace with hash 618210419, now seen corresponding path program 1 times [2021-12-06 17:34:53,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:53,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920169013] [2021-12-06 17:34:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:53,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:53,189 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 17:34:53,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:53,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920169013] [2021-12-06 17:34:53,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920169013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:53,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:53,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:34:53,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519778992] [2021-12-06 17:34:53,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:53,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:34:53,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:53,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:34:53,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:34:53,194 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:53,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:53,263 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2021-12-06 17:34:53,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:34:53,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 17:34:53,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:53,264 INFO L225 Difference]: With dead ends: 48 [2021-12-06 17:34:53,264 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 17:34:53,264 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 17:34:53,265 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:53,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 68 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:34:53,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 17:34:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-06 17:34:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-12-06 17:34:53,268 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 16 [2021-12-06 17:34:53,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:53,268 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-12-06 17:34:53,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:53,269 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-12-06 17:34:53,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 17:34:53,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:53,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:53,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 17:34:53,270 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:53,270 INFO L85 PathProgramCache]: Analyzing trace with hash 618210420, now seen corresponding path program 1 times [2021-12-06 17:34:53,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:53,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483757806] [2021-12-06 17:34:53,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:53,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:53,322 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 17:34:53,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:53,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483757806] [2021-12-06 17:34:53,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483757806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:53,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:53,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:34:53,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592917801] [2021-12-06 17:34:53,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:53,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:34:53,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:53,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:34:53,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:34:53,324 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:53,374 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-12-06 17:34:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:34:53,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 17:34:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:53,375 INFO L225 Difference]: With dead ends: 54 [2021-12-06 17:34:53,375 INFO L226 Difference]: Without dead ends: 54 [2021-12-06 17:34:53,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:34:53,376 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:53,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 80 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-06 17:34:53,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-12-06 17:34:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-12-06 17:34:53,379 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 16 [2021-12-06 17:34:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:53,379 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-12-06 17:34:53,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-12-06 17:34:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 17:34:53,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:53,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:53,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 17:34:53,380 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:53,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:53,380 INFO L85 PathProgramCache]: Analyzing trace with hash 618212108, now seen corresponding path program 1 times [2021-12-06 17:34:53,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:53,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141967885] [2021-12-06 17:34:53,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:53,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:53,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:53,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141967885] [2021-12-06 17:34:53,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141967885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:34:53,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810683025] [2021-12-06 17:34:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:53,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:34:53,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:34:53,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:34:53,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:34:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:53,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 17:34:53,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:34:53,501 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 17:34:53,527 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 17:34:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:53,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:34:53,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810683025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:53,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:34:53,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2021-12-06 17:34:53,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922091255] [2021-12-06 17:34:53,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:53,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:34:53,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:53,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:34:53,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:34:53,539 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:53,589 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2021-12-06 17:34:53,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:34:53,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 17:34:53,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:53,590 INFO L225 Difference]: With dead ends: 75 [2021-12-06 17:34:53,590 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 17:34:53,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:34:53,591 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:53,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 178 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:53,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 17:34:53,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2021-12-06 17:34:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:53,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-12-06 17:34:53,594 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 16 [2021-12-06 17:34:53,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:53,594 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-12-06 17:34:53,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:53,595 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-12-06 17:34:53,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 17:34:53,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:53,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:53,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 17:34:53,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:34:53,796 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:53,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:53,796 INFO L85 PathProgramCache]: Analyzing trace with hash 876377546, now seen corresponding path program 1 times [2021-12-06 17:34:53,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:53,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641580234] [2021-12-06 17:34:53,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:53,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:53,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:53,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641580234] [2021-12-06 17:34:53,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641580234] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:34:53,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440319523] [2021-12-06 17:34:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:53,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:34:53,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:34:53,847 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:34:53,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:34:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:53,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 17:34:53,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:34:53,910 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:34:53,910 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 17:34:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:53,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:34:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:54,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440319523] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:34:54,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:34:54,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2021-12-06 17:34:54,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600246101] [2021-12-06 17:34:54,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:34:54,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:34:54,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:54,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:34:54,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:34:54,038 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 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 17:34:54,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:54,098 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2021-12-06 17:34:54,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:34:54,099 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 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 16 [2021-12-06 17:34:54,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:54,099 INFO L225 Difference]: With dead ends: 76 [2021-12-06 17:34:54,099 INFO L226 Difference]: Without dead ends: 76 [2021-12-06 17:34:54,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:34:54,100 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 157 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:54,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 121 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:54,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-06 17:34:54,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2021-12-06 17:34:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.280701754385965) internal successors, (73), 61 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:54,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-12-06 17:34:54,102 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 16 [2021-12-06 17:34:54,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:54,102 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-12-06 17:34:54,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 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 17:34:54,102 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-12-06 17:34:54,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 17:34:54,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:54,103 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 17:34:54,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:34:54,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:34:54,304 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:54,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:54,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1984653866, now seen corresponding path program 1 times [2021-12-06 17:34:54,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:54,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189243134] [2021-12-06 17:34:54,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:54,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:54,398 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 17:34:54,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:54,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189243134] [2021-12-06 17:34:54,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189243134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:54,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:54,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:34:54,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885196371] [2021-12-06 17:34:54,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:54,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:34:54,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:54,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:34:54,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:34:54,403 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:54,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:54,483 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-12-06 17:34:54,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:34:54,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 17:34:54,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:54,484 INFO L225 Difference]: With dead ends: 61 [2021-12-06 17:34:54,484 INFO L226 Difference]: Without dead ends: 61 [2021-12-06 17:34:54,484 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 17:34:54,485 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:54,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 64 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:34:54,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-06 17:34:54,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-06 17:34:54,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.263157894736842) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-12-06 17:34:54,487 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 17 [2021-12-06 17:34:54,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:54,487 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-12-06 17:34:54,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:54,487 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-12-06 17:34:54,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 17:34:54,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:54,487 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 17:34:54,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 17:34:54,488 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:54,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:54,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1984653867, now seen corresponding path program 1 times [2021-12-06 17:34:54,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:54,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141367745] [2021-12-06 17:34:54,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:54,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:54,524 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 17:34:54,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:54,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141367745] [2021-12-06 17:34:54,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141367745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:54,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:54,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:34:54,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203829259] [2021-12-06 17:34:54,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:54,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:34:54,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:54,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:34:54,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:34:54,525 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 17:34:54,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:54,566 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-12-06 17:34:54,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:34:54,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 17:34:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:54,567 INFO L225 Difference]: With dead ends: 65 [2021-12-06 17:34:54,567 INFO L226 Difference]: Without dead ends: 65 [2021-12-06 17:34:54,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:34:54,567 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:54,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 80 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-06 17:34:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-12-06 17:34:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.25) internal successors, (75), 63 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2021-12-06 17:34:54,569 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 17 [2021-12-06 17:34:54,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:54,570 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2021-12-06 17:34:54,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 17:34:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2021-12-06 17:34:54,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 17:34:54,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:54,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:54,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 17:34:54,570 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:54,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:54,571 INFO L85 PathProgramCache]: Analyzing trace with hash -942701569, now seen corresponding path program 2 times [2021-12-06 17:34:54,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:54,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641048580] [2021-12-06 17:34:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:54,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:34:54,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:54,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641048580] [2021-12-06 17:34:54,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641048580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:54,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:54,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 17:34:54,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448623996] [2021-12-06 17:34:54,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:54,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:34:54,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:54,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:34:54,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:34:54,641 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:54,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:54,732 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2021-12-06 17:34:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:34:54,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 17:34:54,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:54,733 INFO L225 Difference]: With dead ends: 91 [2021-12-06 17:34:54,733 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 17:34:54,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:34:54,733 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 89 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:54,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 184 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:54,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 17:34:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2021-12-06 17:34:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-12-06 17:34:54,735 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 19 [2021-12-06 17:34:54,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:54,736 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-12-06 17:34:54,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-12-06 17:34:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 17:34:54,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:54,736 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:54,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 17:34:54,736 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:54,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:54,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1963769923, now seen corresponding path program 1 times [2021-12-06 17:34:54,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:54,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777349297] [2021-12-06 17:34:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:54,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:34:54,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:54,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777349297] [2021-12-06 17:34:54,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777349297] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:54,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:54,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 17:34:54,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049320323] [2021-12-06 17:34:54,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:54,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:34:54,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:54,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:34:54,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:34:54,814 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:54,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:54,874 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2021-12-06 17:34:54,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:34:54,874 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 17:34:54,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:54,874 INFO L225 Difference]: With dead ends: 82 [2021-12-06 17:34:54,874 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 17:34:54,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:34:54,875 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 133 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:54,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 149 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:54,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 17:34:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 61. [2021-12-06 17:34:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.280701754385965) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-12-06 17:34:54,878 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 19 [2021-12-06 17:34:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:54,878 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-12-06 17:34:54,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-12-06 17:34:54,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:34:54,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:54,879 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:54,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 17:34:54,879 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:54,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:54,879 INFO L85 PathProgramCache]: Analyzing trace with hash 303592444, now seen corresponding path program 1 times [2021-12-06 17:34:54,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:54,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827841942] [2021-12-06 17:34:54,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:54,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:54,960 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 17:34:54,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:54,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827841942] [2021-12-06 17:34:54,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827841942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:54,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:54,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 17:34:54,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660463542] [2021-12-06 17:34:54,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:54,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:34:54,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:54,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:34:54,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:34:54,961 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 17:34:55,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:55,021 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2021-12-06 17:34:55,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:34:55,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 17:34:55,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:55,022 INFO L225 Difference]: With dead ends: 100 [2021-12-06 17:34:55,022 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 17:34:55,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:34:55,022 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:55,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 190 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:55,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 17:34:55,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2021-12-06 17:34:55,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 93 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 17:34:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2021-12-06 17:34:55,026 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 20 [2021-12-06 17:34:55,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:55,026 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2021-12-06 17:34:55,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 17:34:55,026 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2021-12-06 17:34:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:34:55,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:55,026 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:55,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 17:34:55,026 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:55,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:55,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1690552262, now seen corresponding path program 1 times [2021-12-06 17:34:55,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:55,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860969729] [2021-12-06 17:34:55,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:55,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:55,114 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 17:34:55,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:55,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860969729] [2021-12-06 17:34:55,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860969729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:55,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:55,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 17:34:55,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860863561] [2021-12-06 17:34:55,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:55,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:34:55,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:55,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:34:55,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:34:55,115 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 17:34:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:55,243 INFO L93 Difference]: Finished difference Result 122 states and 140 transitions. [2021-12-06 17:34:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:34:55,243 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 17:34:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:55,244 INFO L225 Difference]: With dead ends: 122 [2021-12-06 17:34:55,244 INFO L226 Difference]: Without dead ends: 122 [2021-12-06 17:34:55,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:34:55,245 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 76 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:55,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 201 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:55,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-06 17:34:55,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 91. [2021-12-06 17:34:55,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 90 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 17:34:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2021-12-06 17:34:55,248 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 20 [2021-12-06 17:34:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:55,248 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2021-12-06 17:34:55,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 17:34:55,249 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2021-12-06 17:34:55,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 17:34:55,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:55,249 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:55,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 17:34:55,249 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:55,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:55,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1016067132, now seen corresponding path program 1 times [2021-12-06 17:34:55,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:55,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154572187] [2021-12-06 17:34:55,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:55,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:55,394 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 17:34:55,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:55,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154572187] [2021-12-06 17:34:55,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154572187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:55,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:55,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 17:34:55,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888750864] [2021-12-06 17:34:55,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:55,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:34:55,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:55,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:34:55,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:34:55,395 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 17:34:55,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:55,538 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2021-12-06 17:34:55,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:34:55,538 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 17:34:55,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:55,539 INFO L225 Difference]: With dead ends: 146 [2021-12-06 17:34:55,539 INFO L226 Difference]: Without dead ends: 146 [2021-12-06 17:34:55,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:34:55,540 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 89 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:55,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 195 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:34:55,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-06 17:34:55,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2021-12-06 17:34:55,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.27) internal successors, (127), 103 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2021-12-06 17:34:55,542 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 20 [2021-12-06 17:34:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:55,543 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2021-12-06 17:34:55,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 17:34:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2021-12-06 17:34:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 17:34:55,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:55,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:55,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-06 17:34:55,543 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:55,544 INFO L85 PathProgramCache]: Analyzing trace with hash 821386545, now seen corresponding path program 1 times [2021-12-06 17:34:55,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:55,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89588647] [2021-12-06 17:34:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:55,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:55,585 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 17:34:55,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:55,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89588647] [2021-12-06 17:34:55,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89588647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:55,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:55,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:34:55,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709953367] [2021-12-06 17:34:55,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:55,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:34:55,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:55,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:34:55,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:34:55,587 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:55,601 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2021-12-06 17:34:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:34:55,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 17:34:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:55,602 INFO L225 Difference]: With dead ends: 103 [2021-12-06 17:34:55,602 INFO L226 Difference]: Without dead ends: 86 [2021-12-06 17:34:55,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:34:55,603 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:55,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 54 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:55,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-06 17:34:55,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-06 17:34:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 85 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 17:34:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2021-12-06 17:34:55,611 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 21 [2021-12-06 17:34:55,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:55,611 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2021-12-06 17:34:55,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:55,611 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2021-12-06 17:34:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 17:34:55,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:55,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:55,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-06 17:34:55,611 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:55,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:55,612 INFO L85 PathProgramCache]: Analyzing trace with hash 293432666, now seen corresponding path program 1 times [2021-12-06 17:34:55,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:55,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758118720] [2021-12-06 17:34:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:55,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:55,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:55,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758118720] [2021-12-06 17:34:55,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758118720] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:34:55,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403831153] [2021-12-06 17:34:55,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:55,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:34:55,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:34:55,687 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:34:55,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:34:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:55,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 17:34:55,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:34:55,756 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:34:55,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:34:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:55,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:34:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:55,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403831153] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:34:55,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:34:55,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-06 17:34:55,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207894997] [2021-12-06 17:34:55,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:34:55,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 17:34:55,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:55,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 17:34:55,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-12-06 17:34:55,997 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:56,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:56,282 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2021-12-06 17:34:56,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 17:34:56,283 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 17:34:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:56,283 INFO L225 Difference]: With dead ends: 129 [2021-12-06 17:34:56,283 INFO L226 Difference]: Without dead ends: 129 [2021-12-06 17:34:56,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 17:34:56,284 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 341 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:56,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 152 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:34:56,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-06 17:34:56,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 92. [2021-12-06 17:34:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 89 states have (on average 1.202247191011236) internal successors, (107), 91 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 17:34:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2021-12-06 17:34:56,287 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 23 [2021-12-06 17:34:56,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:56,287 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2021-12-06 17:34:56,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2021-12-06 17:34:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 17:34:56,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:56,287 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:56,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:34:56,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:34:56,488 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:56,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:56,489 INFO L85 PathProgramCache]: Analyzing trace with hash 506425757, now seen corresponding path program 1 times [2021-12-06 17:34:56,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:56,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109121359] [2021-12-06 17:34:56,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:56,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:56,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:56,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109121359] [2021-12-06 17:34:56,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109121359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:34:56,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805549940] [2021-12-06 17:34:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:56,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:34:56,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:34:56,594 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:34:56,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:34:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:56,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 17:34:56,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:34:56,653 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:34:56,653 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 17:34:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:56,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:34:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:56,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805549940] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:34:56,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:34:56,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2021-12-06 17:34:56,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238522431] [2021-12-06 17:34:56,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:34:56,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 17:34:56,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:56,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 17:34:56,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-12-06 17:34:56,874 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:57,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:57,233 INFO L93 Difference]: Finished difference Result 130 states and 143 transitions. [2021-12-06 17:34:57,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 17:34:57,234 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 17:34:57,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:57,234 INFO L225 Difference]: With dead ends: 130 [2021-12-06 17:34:57,234 INFO L226 Difference]: Without dead ends: 124 [2021-12-06 17:34:57,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=1212, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 17:34:57,235 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 303 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:57,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 160 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:34:57,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-06 17:34:57,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2021-12-06 17:34:57,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 96 states have (on average 1.1875) internal successors, (114), 98 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2021-12-06 17:34:57,237 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 24 [2021-12-06 17:34:57,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:57,237 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2021-12-06 17:34:57,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:57,238 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2021-12-06 17:34:57,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 17:34:57,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:57,238 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:57,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:34:57,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:34:57,440 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:57,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:57,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1809160449, now seen corresponding path program 1 times [2021-12-06 17:34:57,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:57,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165835099] [2021-12-06 17:34:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:57,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:57,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:57,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165835099] [2021-12-06 17:34:57,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165835099] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:34:57,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227975758] [2021-12-06 17:34:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:57,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:34:57,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:34:57,546 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:34:57,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:34:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:57,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 17:34:57,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:34:57,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:34:57,614 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 17:34:57,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:34:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:57,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:34:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:57,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227975758] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:34:57,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:34:57,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2021-12-06 17:34:57,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447784536] [2021-12-06 17:34:57,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:34:57,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 17:34:57,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:57,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 17:34:57,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:34:57,876 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:58,115 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2021-12-06 17:34:58,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:34:58,115 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 17:34:58,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:58,116 INFO L225 Difference]: With dead ends: 141 [2021-12-06 17:34:58,116 INFO L226 Difference]: Without dead ends: 141 [2021-12-06 17:34:58,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-12-06 17:34:58,117 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 239 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:58,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 210 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:34:58,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-06 17:34:58,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2021-12-06 17:34:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 114 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2021-12-06 17:34:58,119 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 24 [2021-12-06 17:34:58,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:58,120 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2021-12-06 17:34:58,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:58,120 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2021-12-06 17:34:58,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 17:34:58,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:58,120 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:58,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 17:34:58,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 17:34:58,322 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:58,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:58,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1394123375, now seen corresponding path program 2 times [2021-12-06 17:34:58,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:58,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857987274] [2021-12-06 17:34:58,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:58,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:34:58,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:58,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857987274] [2021-12-06 17:34:58,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857987274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:34:58,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275591590] [2021-12-06 17:34:58,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:34:58,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:34:58,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:34:58,468 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:34:58,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 17:34:58,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:34:58,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:34:58,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 17:34:58,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:34:58,559 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 17:34:58,635 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-06 17:34:58,635 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 17:34:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:34:58,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:34:58,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 17:34:58,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 17:34:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:34:58,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275591590] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:34:58,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:34:58,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2021-12-06 17:34:58,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171220516] [2021-12-06 17:34:58,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:34:58,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 17:34:58,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:58,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 17:34:58,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-12-06 17:34:58,753 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:58,950 INFO L93 Difference]: Finished difference Result 199 states and 220 transitions. [2021-12-06 17:34:58,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 17:34:58,950 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-06 17:34:58,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:58,951 INFO L225 Difference]: With dead ends: 199 [2021-12-06 17:34:58,951 INFO L226 Difference]: Without dead ends: 191 [2021-12-06 17:34:58,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 17:34:58,952 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 146 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:58,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 267 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 126 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2021-12-06 17:34:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-06 17:34:58,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2021-12-06 17:34:58,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 140 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 161 transitions. [2021-12-06 17:34:58,955 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 161 transitions. Word has length 26 [2021-12-06 17:34:58,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:58,955 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 161 transitions. [2021-12-06 17:34:58,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 161 transitions. [2021-12-06 17:34:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 17:34:58,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:58,955 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:34:58,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 17:34:59,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-06 17:34:59,156 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:59,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1149798068, now seen corresponding path program 1 times [2021-12-06 17:34:59,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:59,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711403377] [2021-12-06 17:34:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:59,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:34:59,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:59,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711403377] [2021-12-06 17:34:59,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711403377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:34:59,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:34:59,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 17:34:59,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663294311] [2021-12-06 17:34:59,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:34:59,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:34:59,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:59,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:34:59,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:34:59,263 INFO L87 Difference]: Start difference. First operand 141 states and 161 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:59,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:34:59,386 INFO L93 Difference]: Finished difference Result 156 states and 173 transitions. [2021-12-06 17:34:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:34:59,386 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 17:34:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:34:59,387 INFO L225 Difference]: With dead ends: 156 [2021-12-06 17:34:59,387 INFO L226 Difference]: Without dead ends: 140 [2021-12-06 17:34:59,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:34:59,388 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:34:59,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 155 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:34:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-06 17:34:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2021-12-06 17:34:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.1682242990654206) 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 17:34:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2021-12-06 17:34:59,391 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 27 [2021-12-06 17:34:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:34:59,392 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2021-12-06 17:34:59,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:34:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2021-12-06 17:34:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 17:34:59,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:34:59,392 INFO L514 BasicCegarLoop]: trace histogram [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 17:34:59,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-06 17:34:59,393 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:34:59,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:34:59,393 INFO L85 PathProgramCache]: Analyzing trace with hash 446658823, now seen corresponding path program 2 times [2021-12-06 17:34:59,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:34:59,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374119097] [2021-12-06 17:34:59,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:34:59,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:34:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:34:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:59,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:34:59,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374119097] [2021-12-06 17:34:59,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374119097] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:34:59,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668733770] [2021-12-06 17:34:59,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:34:59,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:34:59,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:34:59,562 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:34:59,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 17:34:59,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:34:59,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:34:59,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 17:34:59,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:34:59,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:34:59,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 17:34:59,723 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 17:34:59,763 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 17:34:59,792 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 17:34:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:34:59,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:34:59,808 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_400 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_400) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-06 17:34:59,815 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_400 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_400) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:34:59,826 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_400 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_400) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)))) is different from false [2021-12-06 17:34:59,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:34:59,842 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 17:34:59,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:34:59,847 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 17:34:59,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:34:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-06 17:34:59,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668733770] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:34:59,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:34:59,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2021-12-06 17:34:59,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348748299] [2021-12-06 17:34:59,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:34:59,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 17:34:59,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:34:59,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 17:34:59,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=435, Unknown=3, NotChecked=132, Total=650 [2021-12-06 17:34:59,947 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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 17:35:00,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:00,180 INFO L93 Difference]: Finished difference Result 187 states and 208 transitions. [2021-12-06 17:35:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:35:00,180 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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 28 [2021-12-06 17:35:00,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:00,181 INFO L225 Difference]: With dead ends: 187 [2021-12-06 17:35:00,181 INFO L226 Difference]: Without dead ends: 157 [2021-12-06 17:35:00,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=651, Unknown=3, NotChecked=162, Total=930 [2021-12-06 17:35:00,181 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 72 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:00,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 387 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 338 Invalid, 0 Unknown, 133 Unchecked, 0.1s Time] [2021-12-06 17:35:00,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-06 17:35:00,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 148. [2021-12-06 17:35:00,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.1517241379310346) internal successors, (167), 147 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 17:35:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 167 transitions. [2021-12-06 17:35:00,184 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 167 transitions. Word has length 28 [2021-12-06 17:35:00,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:00,184 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 167 transitions. [2021-12-06 17:35:00,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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 17:35:00,185 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 167 transitions. [2021-12-06 17:35:00,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 17:35:00,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:00,185 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:00,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 17:35:00,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 17:35:00,386 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:00,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:00,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2025170382, now seen corresponding path program 3 times [2021-12-06 17:35:00,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:00,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619482699] [2021-12-06 17:35:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:00,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:00,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619482699] [2021-12-06 17:35:00,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619482699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250025861] [2021-12-06 17:35:00,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:35:00,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:00,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:00,601 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:00,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 17:35:00,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 17:35:00,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:35:00,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 17:35:00,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:00,684 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:00,685 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 17:35:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:00,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:01,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250025861] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:01,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:01,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2021-12-06 17:35:01,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370585844] [2021-12-06 17:35:01,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:01,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 17:35:01,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:01,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 17:35:01,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-12-06 17:35:01,025 INFO L87 Difference]: Start difference. First operand 148 states and 167 transitions. Second operand has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:01,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:01,467 INFO L93 Difference]: Finished difference Result 216 states and 239 transitions. [2021-12-06 17:35:01,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:35:01,467 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have 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 17:35:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:01,468 INFO L225 Difference]: With dead ends: 216 [2021-12-06 17:35:01,468 INFO L226 Difference]: Without dead ends: 216 [2021-12-06 17:35:01,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=345, Invalid=1377, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 17:35:01,469 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 367 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:01,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 247 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:35:01,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-06 17:35:01,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 157. [2021-12-06 17:35:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 154 states have (on average 1.155844155844156) internal successors, (178), 156 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 178 transitions. [2021-12-06 17:35:01,472 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 178 transitions. Word has length 30 [2021-12-06 17:35:01,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:01,472 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 178 transitions. [2021-12-06 17:35:01,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:01,472 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 178 transitions. [2021-12-06 17:35:01,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 17:35:01,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:01,473 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:01,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 17:35:01,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-06 17:35:01,673 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:01,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:01,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1580697398, now seen corresponding path program 3 times [2021-12-06 17:35:01,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:01,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518014942] [2021-12-06 17:35:01,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:01,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:01,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:01,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518014942] [2021-12-06 17:35:01,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518014942] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:01,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232741507] [2021-12-06 17:35:01,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:35:01,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:01,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:01,782 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:01,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 17:35:01,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 17:35:01,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:35:01,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 17:35:01,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:01,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:35:01,856 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 17:35:01,859 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 10 treesize of output 8 [2021-12-06 17:35:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:02,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:02,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232741507] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:02,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:02,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2021-12-06 17:35:02,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411046072] [2021-12-06 17:35:02,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:02,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 17:35:02,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:02,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 17:35:02,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-12-06 17:35:02,201 INFO L87 Difference]: Start difference. First operand 157 states and 178 transitions. Second operand has 27 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 27 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:02,563 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2021-12-06 17:35:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 17:35:02,563 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 27 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 17:35:02,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:02,564 INFO L225 Difference]: With dead ends: 169 [2021-12-06 17:35:02,564 INFO L226 Difference]: Without dead ends: 169 [2021-12-06 17:35:02,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=269, Invalid=1213, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 17:35:02,564 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 227 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:02,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 364 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:35:02,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-06 17:35:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 162. [2021-12-06 17:35:02,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 159 states have (on average 1.150943396226415) internal successors, (183), 161 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 183 transitions. [2021-12-06 17:35:02,567 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 183 transitions. Word has length 32 [2021-12-06 17:35:02,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:02,567 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 183 transitions. [2021-12-06 17:35:02,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 27 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 183 transitions. [2021-12-06 17:35:02,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 17:35:02,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:02,568 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:02,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 17:35:02,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:02,769 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:02,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:02,770 INFO L85 PathProgramCache]: Analyzing trace with hash -445225321, now seen corresponding path program 4 times [2021-12-06 17:35:02,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:02,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160643962] [2021-12-06 17:35:02,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:02,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:35:02,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:02,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160643962] [2021-12-06 17:35:02,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160643962] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:02,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206834344] [2021-12-06 17:35:02,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:35:02,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:02,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:02,886 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:02,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 17:35:02,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:35:02,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:35:02,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 17:35:02,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:03,003 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 17:35:03,224 INFO L354 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2021-12-06 17:35:03,224 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 38 treesize of output 26 [2021-12-06 17:35:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:35:03,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:03,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2021-12-06 17:35:03,336 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-06 17:35:03,336 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 70 treesize of output 60 [2021-12-06 17:35:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:35:03,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206834344] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:03,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:03,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 35 [2021-12-06 17:35:03,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761689598] [2021-12-06 17:35:03,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:03,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 17:35:03,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:03,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 17:35:03,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 17:35:03,427 INFO L87 Difference]: Start difference. First operand 162 states and 183 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:04,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:04,018 INFO L93 Difference]: Finished difference Result 218 states and 243 transitions. [2021-12-06 17:35:04,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 17:35:04,018 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-06 17:35:04,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:04,020 INFO L225 Difference]: With dead ends: 218 [2021-12-06 17:35:04,020 INFO L226 Difference]: Without dead ends: 207 [2021-12-06 17:35:04,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=610, Invalid=2930, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 17:35:04,021 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 157 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:04,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 344 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 310 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2021-12-06 17:35:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-06 17:35:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2021-12-06 17:35:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 193 states have (on average 1.145077720207254) internal successors, (221), 195 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 17:35:04,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 221 transitions. [2021-12-06 17:35:04,026 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 221 transitions. Word has length 33 [2021-12-06 17:35:04,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:04,026 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 221 transitions. [2021-12-06 17:35:04,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:04,026 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 221 transitions. [2021-12-06 17:35:04,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 17:35:04,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:04,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:04,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 17:35:04,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:04,227 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:04,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:04,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1756979051, now seen corresponding path program 1 times [2021-12-06 17:35:04,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:04,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295910405] [2021-12-06 17:35:04,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:04,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:04,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:04,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295910405] [2021-12-06 17:35:04,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295910405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:04,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159759690] [2021-12-06 17:35:04,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:04,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:04,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:04,316 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:04,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 17:35:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:04,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 17:35:04,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:04,386 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:04,387 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 17:35:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:04,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:04,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159759690] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:04,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:04,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2021-12-06 17:35:04,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379996774] [2021-12-06 17:35:04,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:04,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 17:35:04,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:04,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 17:35:04,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-12-06 17:35:04,732 INFO L87 Difference]: Start difference. First operand 196 states and 221 transitions. Second operand has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:05,256 INFO L93 Difference]: Finished difference Result 227 states and 249 transitions. [2021-12-06 17:35:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 17:35:05,256 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-06 17:35:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:05,257 INFO L225 Difference]: With dead ends: 227 [2021-12-06 17:35:05,257 INFO L226 Difference]: Without dead ends: 227 [2021-12-06 17:35:05,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=1588, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 17:35:05,258 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 377 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:05,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 290 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:35:05,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-06 17:35:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 212. [2021-12-06 17:35:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 209 states have (on average 1.138755980861244) internal successors, (238), 211 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 238 transitions. [2021-12-06 17:35:05,261 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 238 transitions. Word has length 33 [2021-12-06 17:35:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:05,261 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 238 transitions. [2021-12-06 17:35:05,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 238 transitions. [2021-12-06 17:35:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 17:35:05,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:05,262 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:05,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 17:35:05,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 17:35:05,463 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:05,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:05,463 INFO L85 PathProgramCache]: Analyzing trace with hash 603565394, now seen corresponding path program 4 times [2021-12-06 17:35:05,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:05,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894107317] [2021-12-06 17:35:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:05,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:05,761 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 17:35:05,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:05,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894107317] [2021-12-06 17:35:05,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894107317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:05,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418725019] [2021-12-06 17:35:05,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:35:05,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:05,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:05,762 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:05,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 17:35:05,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:35:05,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:35:05,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 17:35:05,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:05,845 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:05,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 17:35:06,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 17:35:06,106 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-12-06 17:35:06,106 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 22 treesize of output 21 [2021-12-06 17:35:06,351 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-06 17:35:06,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 40 [2021-12-06 17:35:06,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:35:06,382 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 44 treesize of output 46 [2021-12-06 17:35:06,563 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 24 treesize of output 24 [2021-12-06 17:35:06,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:35:06,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:35:06,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:35:06,670 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 25 treesize of output 11 [2021-12-06 17:35:06,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:35:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:06,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:07,306 INFO L354 Elim1Store]: treesize reduction 23, result has 46.5 percent of original size [2021-12-06 17:35:07,306 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 67 treesize of output 71 [2021-12-06 17:35:07,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:35:07,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:35:07,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:35:07,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2021-12-06 17:35:07,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:35:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:07,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418725019] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:07,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:07,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 49 [2021-12-06 17:35:07,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289139573] [2021-12-06 17:35:07,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:07,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 17:35:07,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:07,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 17:35:07,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2169, Unknown=14, NotChecked=0, Total=2352 [2021-12-06 17:35:07,839 INFO L87 Difference]: Start difference. First operand 212 states and 238 transitions. Second operand has 49 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 49 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:10,477 INFO L93 Difference]: Finished difference Result 294 states and 328 transitions. [2021-12-06 17:35:10,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 17:35:10,477 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 49 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-06 17:35:10,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:10,478 INFO L225 Difference]: With dead ends: 294 [2021-12-06 17:35:10,478 INFO L226 Difference]: Without dead ends: 260 [2021-12-06 17:35:10,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=569, Invalid=7746, Unknown=57, NotChecked=0, Total=8372 [2021-12-06 17:35:10,482 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 179 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:10,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 639 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 490 Invalid, 0 Unknown, 432 Unchecked, 0.2s Time] [2021-12-06 17:35:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-06 17:35:10,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 249. [2021-12-06 17:35:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 246 states have (on average 1.1341463414634145) internal successors, (279), 248 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 279 transitions. [2021-12-06 17:35:10,487 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 279 transitions. Word has length 36 [2021-12-06 17:35:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:10,487 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 279 transitions. [2021-12-06 17:35:10,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 49 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 279 transitions. [2021-12-06 17:35:10,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 17:35:10,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:10,488 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:10,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 17:35:10,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 17:35:10,688 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:10,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:10,689 INFO L85 PathProgramCache]: Analyzing trace with hash -541196940, now seen corresponding path program 5 times [2021-12-06 17:35:10,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:10,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091701414] [2021-12-06 17:35:10,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:10,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:10,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:10,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091701414] [2021-12-06 17:35:10,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091701414] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:10,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848575424] [2021-12-06 17:35:10,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:35:10,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:10,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:10,791 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:10,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 17:35:10,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 17:35:10,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:35:10,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 17:35:10,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:10,868 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:10,868 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 17:35:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:11,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:11,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848575424] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:11,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:11,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2021-12-06 17:35:11,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358410688] [2021-12-06 17:35:11,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:11,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 17:35:11,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:11,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 17:35:11,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-12-06 17:35:11,258 INFO L87 Difference]: Start difference. First operand 249 states and 279 transitions. Second operand has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:11,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:11,704 INFO L93 Difference]: Finished difference Result 389 states and 424 transitions. [2021-12-06 17:35:11,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 17:35:11,704 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-06 17:35:11,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:11,706 INFO L225 Difference]: With dead ends: 389 [2021-12-06 17:35:11,706 INFO L226 Difference]: Without dead ends: 389 [2021-12-06 17:35:11,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=442, Invalid=1720, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 17:35:11,707 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 281 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:11,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 346 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:35:11,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-12-06 17:35:11,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 258. [2021-12-06 17:35:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 255 states have (on average 1.1372549019607843) internal successors, (290), 257 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 17:35:11,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 290 transitions. [2021-12-06 17:35:11,712 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 290 transitions. Word has length 37 [2021-12-06 17:35:11,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:11,712 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 290 transitions. [2021-12-06 17:35:11,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 290 transitions. [2021-12-06 17:35:11,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 17:35:11,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:11,713 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:11,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 17:35:11,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:11,914 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:11,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:11,915 INFO L85 PathProgramCache]: Analyzing trace with hash -916383204, now seen corresponding path program 1 times [2021-12-06 17:35:11,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:11,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745215988] [2021-12-06 17:35:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:11,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:12,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:12,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745215988] [2021-12-06 17:35:12,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745215988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:12,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403075265] [2021-12-06 17:35:12,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:12,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:12,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:12,051 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:12,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 17:35:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:12,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 17:35:12,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:12,116 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:12,116 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 17:35:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:12,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:12,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403075265] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:12,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:12,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2021-12-06 17:35:12,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003942606] [2021-12-06 17:35:12,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:12,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 17:35:12,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 17:35:12,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 17:35:12,602 INFO L87 Difference]: Start difference. First operand 258 states and 290 transitions. Second operand has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:13,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:13,555 INFO L93 Difference]: Finished difference Result 342 states and 371 transitions. [2021-12-06 17:35:13,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 17:35:13,556 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-06 17:35:13,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:13,557 INFO L225 Difference]: With dead ends: 342 [2021-12-06 17:35:13,557 INFO L226 Difference]: Without dead ends: 317 [2021-12-06 17:35:13,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=706, Invalid=3076, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 17:35:13,558 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 473 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:13,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 363 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:35:13,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-12-06 17:35:13,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 256. [2021-12-06 17:35:13,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 253 states have (on average 1.1264822134387351) internal successors, (285), 255 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 285 transitions. [2021-12-06 17:35:13,563 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 285 transitions. Word has length 39 [2021-12-06 17:35:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:13,563 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 285 transitions. [2021-12-06 17:35:13,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 285 transitions. [2021-12-06 17:35:13,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 17:35:13,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:13,564 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:13,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 17:35:13,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-06 17:35:13,764 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:13,765 INFO L85 PathProgramCache]: Analyzing trace with hash 509207573, now seen corresponding path program 6 times [2021-12-06 17:35:13,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:13,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417094125] [2021-12-06 17:35:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:13,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:35:13,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:13,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417094125] [2021-12-06 17:35:13,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417094125] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:13,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525379664] [2021-12-06 17:35:13,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:35:13,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:13,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:13,887 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:13,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 17:35:13,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 17:35:13,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:35:13,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 17:35:13,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:14,024 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 14 treesize of output 10 [2021-12-06 17:35:14,094 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 17:35:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:35:14,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:14,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 17:35:14,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 17:35:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:35:14,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525379664] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:14,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:14,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2021-12-06 17:35:14,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492984910] [2021-12-06 17:35:14,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:14,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 17:35:14,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:14,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 17:35:14,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-12-06 17:35:14,210 INFO L87 Difference]: Start difference. First operand 256 states and 285 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:14,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:14,519 INFO L93 Difference]: Finished difference Result 488 states and 529 transitions. [2021-12-06 17:35:14,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 17:35:14,519 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-06 17:35:14,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:14,521 INFO L225 Difference]: With dead ends: 488 [2021-12-06 17:35:14,521 INFO L226 Difference]: Without dead ends: 460 [2021-12-06 17:35:14,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 17:35:14,522 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 260 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:14,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 623 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 571 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2021-12-06 17:35:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-06 17:35:14,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 291. [2021-12-06 17:35:14,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 288 states have (on average 1.1284722222222223) internal successors, (325), 290 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 325 transitions. [2021-12-06 17:35:14,527 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 325 transitions. Word has length 40 [2021-12-06 17:35:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:14,527 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 325 transitions. [2021-12-06 17:35:14,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:14,528 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 325 transitions. [2021-12-06 17:35:14,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 17:35:14,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:14,528 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:14,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 17:35:14,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-06 17:35:14,729 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:14,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:14,730 INFO L85 PathProgramCache]: Analyzing trace with hash 500447765, now seen corresponding path program 5 times [2021-12-06 17:35:14,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:14,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252435056] [2021-12-06 17:35:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:14,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:14,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:14,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252435056] [2021-12-06 17:35:14,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252435056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:14,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867371786] [2021-12-06 17:35:14,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:35:14,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:14,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:14,866 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:14,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 17:35:14,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 17:35:14,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:35:14,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 17:35:14,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:14,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:35:14,942 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 17:35:14,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:35:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:15,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:15,311 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:15,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867371786] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:15,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:15,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2021-12-06 17:35:15,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472837738] [2021-12-06 17:35:15,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:15,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 17:35:15,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:15,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 17:35:15,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-12-06 17:35:15,312 INFO L87 Difference]: Start difference. First operand 291 states and 325 transitions. Second operand has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:15,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:15,724 INFO L93 Difference]: Finished difference Result 387 states and 425 transitions. [2021-12-06 17:35:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 17:35:15,725 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-06 17:35:15,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:15,726 INFO L225 Difference]: With dead ends: 387 [2021-12-06 17:35:15,726 INFO L226 Difference]: Without dead ends: 387 [2021-12-06 17:35:15,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 17:35:15,727 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 417 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:15,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 523 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:35:15,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-06 17:35:15,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 329. [2021-12-06 17:35:15,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 326 states have (on average 1.138036809815951) internal successors, (371), 328 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:15,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 371 transitions. [2021-12-06 17:35:15,732 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 371 transitions. Word has length 40 [2021-12-06 17:35:15,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:15,732 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 371 transitions. [2021-12-06 17:35:15,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 29 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:15,733 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 371 transitions. [2021-12-06 17:35:15,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 17:35:15,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:15,733 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-12-06 17:35:15,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 17:35:15,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:15,934 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:15,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:15,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2139029910, now seen corresponding path program 1 times [2021-12-06 17:35:15,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:15,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160785099] [2021-12-06 17:35:15,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:15,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:35:16,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:16,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160785099] [2021-12-06 17:35:16,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160785099] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:16,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927574453] [2021-12-06 17:35:16,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:16,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:16,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:16,160 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:16,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 17:35:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:16,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 17:35:16,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:16,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:35:16,330 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 17:35:16,354 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 17:35:16,457 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 17:35:16,487 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 17:35:16,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:35:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:35:16,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:16,507 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_769 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_769) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-06 17:35:16,512 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_769 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_769) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:35:16,517 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_768 (Array Int Int)) (v_ArrVal_769 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_768) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_769) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:35:16,523 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_769 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_769) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:35:16,536 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_769 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_769) |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 17:35:16,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:35:16,542 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 17:35:16,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:35:16,546 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 17:35:16,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:35:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 11 not checked. [2021-12-06 17:35:16,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927574453] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:16,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:16,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 32 [2021-12-06 17:35:16,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701607088] [2021-12-06 17:35:16,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:16,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 17:35:16,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:16,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 17:35:16,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=627, Unknown=5, NotChecked=270, Total=992 [2021-12-06 17:35:16,684 INFO L87 Difference]: Start difference. First operand 329 states and 371 transitions. Second operand has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 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 17:35:17,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:17,001 INFO L93 Difference]: Finished difference Result 383 states and 419 transitions. [2021-12-06 17:35:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 17:35:17,001 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 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) Word has length 43 [2021-12-06 17:35:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:17,003 INFO L225 Difference]: With dead ends: 383 [2021-12-06 17:35:17,003 INFO L226 Difference]: Without dead ends: 343 [2021-12-06 17:35:17,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=997, Unknown=5, NotChecked=340, Total=1482 [2021-12-06 17:35:17,003 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 87 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:17,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 849 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 526 Invalid, 0 Unknown, 452 Unchecked, 0.1s Time] [2021-12-06 17:35:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-06 17:35:17,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 324. [2021-12-06 17:35:17,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 321 states have (on average 1.1214953271028036) internal successors, (360), 323 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 17:35:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 360 transitions. [2021-12-06 17:35:17,008 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 360 transitions. Word has length 43 [2021-12-06 17:35:17,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:17,008 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 360 transitions. [2021-12-06 17:35:17,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 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 17:35:17,008 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 360 transitions. [2021-12-06 17:35:17,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 17:35:17,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:17,008 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:17,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 17:35:17,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-06 17:35:17,209 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:17,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:17,210 INFO L85 PathProgramCache]: Analyzing trace with hash -203339112, now seen corresponding path program 7 times [2021-12-06 17:35:17,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:17,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82773255] [2021-12-06 17:35:17,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:17,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:17,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:17,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82773255] [2021-12-06 17:35:17,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82773255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:17,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209487573] [2021-12-06 17:35:17,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:35:17,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:17,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:17,356 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:17,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 17:35:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:17,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 17:35:17,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:17,422 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:17,422 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 17:35:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:17,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:17,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209487573] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:17,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:17,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2021-12-06 17:35:17,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660427566] [2021-12-06 17:35:17,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:17,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 17:35:17,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:17,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 17:35:17,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1370, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 17:35:17,941 INFO L87 Difference]: Start difference. First operand 324 states and 360 transitions. Second operand has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:18,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:18,752 INFO L93 Difference]: Finished difference Result 558 states and 603 transitions. [2021-12-06 17:35:18,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:35:18,753 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-06 17:35:18,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:18,755 INFO L225 Difference]: With dead ends: 558 [2021-12-06 17:35:18,755 INFO L226 Difference]: Without dead ends: 558 [2021-12-06 17:35:18,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=686, Invalid=2974, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 17:35:18,756 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 438 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:18,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 548 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:35:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-12-06 17:35:18,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 336. [2021-12-06 17:35:18,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 333 states have (on average 1.1261261261261262) internal successors, (375), 335 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 375 transitions. [2021-12-06 17:35:18,762 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 375 transitions. Word has length 44 [2021-12-06 17:35:18,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:18,762 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 375 transitions. [2021-12-06 17:35:18,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:18,762 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 375 transitions. [2021-12-06 17:35:18,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 17:35:18,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:18,763 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:18,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 17:35:18,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:18,963 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:18,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1180553501, now seen corresponding path program 6 times [2021-12-06 17:35:18,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:18,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042024919] [2021-12-06 17:35:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:18,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:19,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:19,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042024919] [2021-12-06 17:35:19,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042024919] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:19,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975598863] [2021-12-06 17:35:19,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:35:19,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:19,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:19,228 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:19,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 17:35:19,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 17:35:19,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:35:19,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-06 17:35:19,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:19,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:35:19,434 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 17:35:19,461 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 17:35:19,557 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 17:35:19,607 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 17:35:19,620 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 17:35:19,626 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 17:35:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:19,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:19,638 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-06 17:35:19,643 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:35:19,649 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int)) (v_ArrVal_857 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_857) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:35:19,654 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:35:19,659 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_856 (Array Int Int)) (v_ArrVal_858 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_856) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:35:19,665 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_858) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:35:19,671 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_858 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_858) |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 17:35:19,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:35:19,677 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 17:35:19,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:35:19,680 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 17:35:19,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:35:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 23 not checked. [2021-12-06 17:35:19,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975598863] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:19,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:19,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 40 [2021-12-06 17:35:19,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501823882] [2021-12-06 17:35:19,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:19,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 17:35:19,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:19,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 17:35:19,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=965, Unknown=7, NotChecked=476, Total=1560 [2021-12-06 17:35:19,815 INFO L87 Difference]: Start difference. First operand 336 states and 375 transitions. Second operand has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 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 17:35:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:20,364 INFO L93 Difference]: Finished difference Result 500 states and 552 transitions. [2021-12-06 17:35:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 17:35:20,364 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 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 44 [2021-12-06 17:35:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:20,365 INFO L225 Difference]: With dead ends: 500 [2021-12-06 17:35:20,366 INFO L226 Difference]: Without dead ends: 461 [2021-12-06 17:35:20,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 67 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=169, Invalid=1492, Unknown=7, NotChecked=588, Total=2256 [2021-12-06 17:35:20,366 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 98 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 731 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:20,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 1212 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 820 Invalid, 0 Unknown, 731 Unchecked, 0.2s Time] [2021-12-06 17:35:20,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-12-06 17:35:20,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 427. [2021-12-06 17:35:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 424 states have (on average 1.1273584905660377) internal successors, (478), 426 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 478 transitions. [2021-12-06 17:35:20,372 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 478 transitions. Word has length 44 [2021-12-06 17:35:20,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:20,372 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 478 transitions. [2021-12-06 17:35:20,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 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 17:35:20,372 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 478 transitions. [2021-12-06 17:35:20,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 17:35:20,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:20,373 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:20,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 17:35:20,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 17:35:20,573 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:20,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:20,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1771580303, now seen corresponding path program 8 times [2021-12-06 17:35:20,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:20,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776355548] [2021-12-06 17:35:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:20,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:35:20,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:20,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776355548] [2021-12-06 17:35:20,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776355548] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:20,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762375455] [2021-12-06 17:35:20,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:35:20,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:20,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:20,696 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:20,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 17:35:20,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:35:20,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:35:20,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 17:35:20,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:20,860 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 17:35:20,933 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 17:35:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:35:20,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:20,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 17:35:20,975 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 26 treesize of output 22 [2021-12-06 17:35:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:35:21,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762375455] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:21,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:21,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 30 [2021-12-06 17:35:21,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701999629] [2021-12-06 17:35:21,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:21,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 17:35:21,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:21,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 17:35:21,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-12-06 17:35:21,051 INFO L87 Difference]: Start difference. First operand 427 states and 478 transitions. Second operand has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:21,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:21,461 INFO L93 Difference]: Finished difference Result 895 states and 967 transitions. [2021-12-06 17:35:21,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 17:35:21,462 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-06 17:35:21,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:21,464 INFO L225 Difference]: With dead ends: 895 [2021-12-06 17:35:21,465 INFO L226 Difference]: Without dead ends: 878 [2021-12-06 17:35:21,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=1568, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 17:35:21,465 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 291 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:21,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 1035 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 987 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2021-12-06 17:35:21,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-12-06 17:35:21,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 515. [2021-12-06 17:35:21,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 512 states have (on average 1.126953125) internal successors, (577), 514 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 577 transitions. [2021-12-06 17:35:21,473 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 577 transitions. Word has length 47 [2021-12-06 17:35:21,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:21,473 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 577 transitions. [2021-12-06 17:35:21,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:21,473 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 577 transitions. [2021-12-06 17:35:21,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 17:35:21,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:21,474 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:21,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 17:35:21,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-06 17:35:21,675 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:21,676 INFO L85 PathProgramCache]: Analyzing trace with hash 588049120, now seen corresponding path program 7 times [2021-12-06 17:35:21,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:21,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131403514] [2021-12-06 17:35:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:21,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:21,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:21,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131403514] [2021-12-06 17:35:21,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131403514] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:21,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816728753] [2021-12-06 17:35:21,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:35:21,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:21,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:21,846 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:21,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 17:35:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:21,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 17:35:21,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:21,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:35:21,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 17:35:21,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:35:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:22,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:22,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816728753] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:22,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:22,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2021-12-06 17:35:22,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846389013] [2021-12-06 17:35:22,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:22,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 17:35:22,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:22,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 17:35:22,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 17:35:22,546 INFO L87 Difference]: Start difference. First operand 515 states and 577 transitions. Second operand has 39 states, 38 states have (on average 3.526315789473684) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:23,298 INFO L93 Difference]: Finished difference Result 558 states and 611 transitions. [2021-12-06 17:35:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:35:23,299 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.526315789473684) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-06 17:35:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:23,301 INFO L225 Difference]: With dead ends: 558 [2021-12-06 17:35:23,301 INFO L226 Difference]: Without dead ends: 558 [2021-12-06 17:35:23,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=642, Invalid=3018, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 17:35:23,301 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 502 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:23,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 726 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:35:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-12-06 17:35:23,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 520. [2021-12-06 17:35:23,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 517 states have (on average 1.125725338491296) internal successors, (582), 519 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 17:35:23,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 582 transitions. [2021-12-06 17:35:23,307 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 582 transitions. Word has length 48 [2021-12-06 17:35:23,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:23,307 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 582 transitions. [2021-12-06 17:35:23,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.526315789473684) internal successors, (134), 39 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:23,308 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 582 transitions. [2021-12-06 17:35:23,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 17:35:23,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:23,308 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-12-06 17:35:23,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 17:35:23,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-06 17:35:23,510 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:23,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:23,511 INFO L85 PathProgramCache]: Analyzing trace with hash 615332876, now seen corresponding path program 2 times [2021-12-06 17:35:23,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:23,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525804575] [2021-12-06 17:35:23,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:23,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:23,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:23,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525804575] [2021-12-06 17:35:23,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525804575] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:23,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809197164] [2021-12-06 17:35:23,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:35:23,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:23,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:23,681 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:23,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 17:35:23,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:35:23,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:35:23,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 17:35:23,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:23,764 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:23,764 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 17:35:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:35:24,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:35:24,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809197164] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:24,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:24,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2021-12-06 17:35:24,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810855014] [2021-12-06 17:35:24,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:24,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 17:35:24,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:24,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 17:35:24,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 17:35:24,354 INFO L87 Difference]: Start difference. First operand 520 states and 582 transitions. Second operand has 39 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 39 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:26,323 INFO L93 Difference]: Finished difference Result 678 states and 735 transitions. [2021-12-06 17:35:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 17:35:26,324 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 39 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-06 17:35:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:26,326 INFO L225 Difference]: With dead ends: 678 [2021-12-06 17:35:26,326 INFO L226 Difference]: Without dead ends: 629 [2021-12-06 17:35:26,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1415, Invalid=6067, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 17:35:26,327 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 854 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:26,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 675 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:35:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-12-06 17:35:26,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 531. [2021-12-06 17:35:26,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 528 states have (on average 1.1174242424242424) internal successors, (590), 530 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 590 transitions. [2021-12-06 17:35:26,334 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 590 transitions. Word has length 48 [2021-12-06 17:35:26,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:26,334 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 590 transitions. [2021-12-06 17:35:26,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.3684210526315788) internal successors, (128), 39 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:26,334 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 590 transitions. [2021-12-06 17:35:26,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 17:35:26,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:26,335 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:26,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 17:35:26,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 17:35:26,536 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:26,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:26,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1424251762, now seen corresponding path program 9 times [2021-12-06 17:35:26,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:26,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578268622] [2021-12-06 17:35:26,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:26,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:26,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:26,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578268622] [2021-12-06 17:35:26,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578268622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:26,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863999403] [2021-12-06 17:35:26,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:35:26,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:26,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:26,710 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:26,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 17:35:26,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 17:35:26,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:35:26,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 17:35:26,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:26,823 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:26,823 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 17:35:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:27,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 45 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:27,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863999403] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:27,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:27,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 46 [2021-12-06 17:35:27,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691864075] [2021-12-06 17:35:27,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:27,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 17:35:27,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:27,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 17:35:27,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1879, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 17:35:27,555 INFO L87 Difference]: Start difference. First operand 531 states and 590 transitions. Second operand has 47 states, 46 states have (on average 3.108695652173913) internal successors, (143), 47 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 17:35:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:28,559 INFO L93 Difference]: Finished difference Result 963 states and 1037 transitions. [2021-12-06 17:35:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 17:35:28,560 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.108695652173913) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-06 17:35:28,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:28,563 INFO L225 Difference]: With dead ends: 963 [2021-12-06 17:35:28,563 INFO L226 Difference]: Without dead ends: 963 [2021-12-06 17:35:28,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=996, Invalid=4116, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 17:35:28,564 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 538 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:28,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 583 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:35:28,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-12-06 17:35:28,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 546. [2021-12-06 17:35:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 543 states have (on average 1.1215469613259668) internal successors, (609), 545 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:28,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 609 transitions. [2021-12-06 17:35:28,571 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 609 transitions. Word has length 51 [2021-12-06 17:35:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:28,571 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 609 transitions. [2021-12-06 17:35:28,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.108695652173913) internal successors, (143), 47 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 17:35:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 609 transitions. [2021-12-06 17:35:28,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 17:35:28,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:28,572 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:28,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-06 17:35:28,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:28,774 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:28,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:28,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1427430296, now seen corresponding path program 8 times [2021-12-06 17:35:28,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:28,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066844398] [2021-12-06 17:35:28,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:28,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:29,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:29,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066844398] [2021-12-06 17:35:29,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066844398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:29,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157465900] [2021-12-06 17:35:29,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:35:29,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:29,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:29,220 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:29,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 17:35:29,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:35:29,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:35:29,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-06 17:35:29,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:29,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:35:29,478 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 17:35:29,513 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 17:35:29,613 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 17:35:29,667 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 17:35:29,704 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 17:35:29,716 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 17:35:29,721 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 17:35:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:29,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:29,733 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-06 17:35:29,737 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:35:29,742 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int)) (v_ArrVal_1097 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1097) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:35:29,747 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:35:29,751 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int)) (v_ArrVal_1096 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1096) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:35:29,756 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)))) is different from false [2021-12-06 17:35:29,761 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int)) (v_ArrVal_1095 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1095) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:35:29,766 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1098) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 4)) 0)) is different from false [2021-12-06 17:35:29,771 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1098) |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 17:35:29,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:35:29,781 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 17:35:29,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:35:29,785 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 17:35:29,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 17:35:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 39 not checked. [2021-12-06 17:35:29,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157465900] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:29,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:29,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21, 21] total 51 [2021-12-06 17:35:29,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567252658] [2021-12-06 17:35:29,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:29,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 17:35:29,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:29,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 17:35:29,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1620, Unknown=9, NotChecked=792, Total=2550 [2021-12-06 17:35:29,938 INFO L87 Difference]: Start difference. First operand 546 states and 609 transitions. Second operand has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:30,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:30,869 INFO L93 Difference]: Finished difference Result 658 states and 728 transitions. [2021-12-06 17:35:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 17:35:30,869 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-06 17:35:30,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:30,871 INFO L225 Difference]: With dead ends: 658 [2021-12-06 17:35:30,871 INFO L226 Difference]: Without dead ends: 611 [2021-12-06 17:35:30,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 11 SemanticMatches, 68 ConstructedPredicates, 9 IntricatePredicates, 1 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=249, Invalid=3438, Unknown=9, NotChecked=1134, Total=4830 [2021-12-06 17:35:30,872 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 164 mSDsluCounter, 1433 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 763 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:30,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1492 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1095 Invalid, 0 Unknown, 763 Unchecked, 0.3s Time] [2021-12-06 17:35:30,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-12-06 17:35:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 601. [2021-12-06 17:35:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 598 states have (on average 1.120401337792642) internal successors, (670), 600 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 670 transitions. [2021-12-06 17:35:30,880 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 670 transitions. Word has length 52 [2021-12-06 17:35:30,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:30,881 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 670 transitions. [2021-12-06 17:35:30,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:30,881 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 670 transitions. [2021-12-06 17:35:30,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 17:35:30,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:30,882 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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 17:35:30,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-06 17:35:31,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:31,083 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:31,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:31,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1083226314, now seen corresponding path program 3 times [2021-12-06 17:35:31,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:31,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402771258] [2021-12-06 17:35:31,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:31,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:35:31,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:31,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402771258] [2021-12-06 17:35:31,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402771258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:31,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190580745] [2021-12-06 17:35:31,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:35:31,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:31,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:31,266 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:31,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 17:35:31,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 17:35:31,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:35:31,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 17:35:31,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:31,381 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:35:31,381 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 17:35:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:35:31,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:35:32,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190580745] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:32,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:32,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2021-12-06 17:35:32,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061003844] [2021-12-06 17:35:32,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:32,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 17:35:32,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:32,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 17:35:32,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 17:35:32,050 INFO L87 Difference]: Start difference. First operand 601 states and 670 transitions. Second operand has 46 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:34,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:35:34,451 INFO L93 Difference]: Finished difference Result 913 states and 980 transitions. [2021-12-06 17:35:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 17:35:34,451 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-06 17:35:34,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:35:34,454 INFO L225 Difference]: With dead ends: 913 [2021-12-06 17:35:34,454 INFO L226 Difference]: Without dead ends: 821 [2021-12-06 17:35:34,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2093, Invalid=8827, Unknown=0, NotChecked=0, Total=10920 [2021-12-06 17:35:34,455 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 761 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:35:34,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 725 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:35:34,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-12-06 17:35:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 553. [2021-12-06 17:35:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 550 states have (on average 1.1090909090909091) internal successors, (610), 552 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 610 transitions. [2021-12-06 17:35:34,464 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 610 transitions. Word has length 53 [2021-12-06 17:35:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:35:34,464 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 610 transitions. [2021-12-06 17:35:34,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 46 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:35:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 610 transitions. [2021-12-06 17:35:34,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 17:35:34,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:35:34,465 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:35:34,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-06 17:35:34,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:34,666 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:35:34,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:35:34,667 INFO L85 PathProgramCache]: Analyzing trace with hash 97693371, now seen corresponding path program 10 times [2021-12-06 17:35:34,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:35:34,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230004626] [2021-12-06 17:35:34,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:35:34,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:35:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:35:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:35:34,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:35:34,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230004626] [2021-12-06 17:35:34,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230004626] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:35:34,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719528675] [2021-12-06 17:35:34,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:35:34,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:35:34,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:35:34,861 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:35:34,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 17:35:34,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:35:34,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:35:34,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 17:35:34,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:35:35,092 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 17:35:47,737 INFO L354 Elim1Store]: treesize reduction 223, result has 9.7 percent of original size [2021-12-06 17:35:47,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 50 [2021-12-06 17:35:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 46 proven. 50 refuted. 17 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:35:47,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:35:48,309 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 89 treesize of output 77 [2021-12-06 17:35:48,313 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-12-06 17:35:48,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 145 treesize of output 123 [2021-12-06 17:35:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:35:48,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719528675] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:35:48,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:35:48,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 28, 28] total 65 [2021-12-06 17:35:48,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303594956] [2021-12-06 17:35:48,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:35:48,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 17:35:48,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:35:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 17:35:48,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=3663, Unknown=26, NotChecked=0, Total=4160 [2021-12-06 17:35:48,576 INFO L87 Difference]: Start difference. First operand 553 states and 610 transitions. Second operand has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 65 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:17,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:36:17,931 INFO L93 Difference]: Finished difference Result 724 states and 794 transitions. [2021-12-06 17:36:17,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 17:36:17,932 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 65 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 17:36:17,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:36:17,934 INFO L225 Difference]: With dead ends: 724 [2021-12-06 17:36:17,934 INFO L226 Difference]: Without dead ends: 684 [2021-12-06 17:36:17,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4013 ImplicationChecksByTransitivity, 42.3s TimeCoverageRelationStatistics Valid=1828, Invalid=13104, Unknown=74, NotChecked=0, Total=15006 [2021-12-06 17:36:17,935 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 293 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:36:17,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 523 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 906 Invalid, 0 Unknown, 519 Unchecked, 0.3s Time] [2021-12-06 17:36:17,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-12-06 17:36:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 642. [2021-12-06 17:36:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 639 states have (on average 1.109546165884194) internal successors, (709), 641 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 709 transitions. [2021-12-06 17:36:17,941 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 709 transitions. Word has length 54 [2021-12-06 17:36:17,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:36:17,941 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 709 transitions. [2021-12-06 17:36:17,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 65 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 709 transitions. [2021-12-06 17:36:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 17:36:17,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:36:17,942 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:36:17,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-06 17:36:18,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:36:18,143 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:36:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:36:18,144 INFO L85 PathProgramCache]: Analyzing trace with hash 126995243, now seen corresponding path program 9 times [2021-12-06 17:36:18,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:36:18,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329691934] [2021-12-06 17:36:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:36:18,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:36:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:18,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:36:18,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329691934] [2021-12-06 17:36:18,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329691934] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:36:18,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734871362] [2021-12-06 17:36:18,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:36:18,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:36:18,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:36:18,327 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:36:18,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 17:36:18,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 17:36:18,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:36:18,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 17:36:18,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:36:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:18,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:36:18,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 17:36:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:18,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734871362] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:36:18,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:36:18,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2021-12-06 17:36:18,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871679502] [2021-12-06 17:36:18,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:36:18,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 17:36:18,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:36:18,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 17:36:18,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 17:36:18,929 INFO L87 Difference]: Start difference. First operand 642 states and 709 transitions. Second operand has 41 states, 40 states have (on average 3.35) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:19,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:36:19,588 INFO L93 Difference]: Finished difference Result 846 states and 921 transitions. [2021-12-06 17:36:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 17:36:19,589 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.35) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-06 17:36:19,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:36:19,593 INFO L225 Difference]: With dead ends: 846 [2021-12-06 17:36:19,593 INFO L226 Difference]: Without dead ends: 846 [2021-12-06 17:36:19,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=673, Invalid=2867, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 17:36:19,594 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 432 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:36:19,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 1077 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:36:19,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-12-06 17:36:19,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 707. [2021-12-06 17:36:19,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 704 states have (on average 1.1207386363636365) internal successors, (789), 706 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:19,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 789 transitions. [2021-12-06 17:36:19,605 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 789 transitions. Word has length 56 [2021-12-06 17:36:19,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:36:19,606 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 789 transitions. [2021-12-06 17:36:19,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.35) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:19,606 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 789 transitions. [2021-12-06 17:36:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 17:36:19,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:36:19,607 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:36:19,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 17:36:19,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-06 17:36:19,808 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:36:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:36:19,808 INFO L85 PathProgramCache]: Analyzing trace with hash -358114732, now seen corresponding path program 2 times [2021-12-06 17:36:19,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:36:19,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623227348] [2021-12-06 17:36:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:36:19,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:36:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:19,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:36:19,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623227348] [2021-12-06 17:36:19,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623227348] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:36:19,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865770243] [2021-12-06 17:36:19,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:36:19,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:36:19,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:36:19,966 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:36:19,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 17:36:20,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:36:20,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:36:20,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 17:36:20,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:36:20,066 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:36:20,066 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 17:36:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:20,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:36:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:20,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865770243] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:36:20,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:36:20,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2021-12-06 17:36:20,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030512824] [2021-12-06 17:36:20,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:36:20,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 17:36:20,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:36:20,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 17:36:20,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1830, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 17:36:20,806 INFO L87 Difference]: Start difference. First operand 707 states and 789 transitions. Second operand has 46 states, 45 states have (on average 3.6) internal successors, (162), 46 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:22,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:36:22,373 INFO L93 Difference]: Finished difference Result 1012 states and 1096 transitions. [2021-12-06 17:36:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 17:36:22,373 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.6) internal successors, (162), 46 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-06 17:36:22,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:36:22,377 INFO L225 Difference]: With dead ends: 1012 [2021-12-06 17:36:22,377 INFO L226 Difference]: Without dead ends: 1012 [2021-12-06 17:36:22,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1507 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1593, Invalid=6063, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 17:36:22,377 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 786 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:36:22,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 685 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:36:22,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-12-06 17:36:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 720. [2021-12-06 17:36:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 717 states have (on average 1.1227336122733613) internal successors, (805), 719 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:22,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 805 transitions. [2021-12-06 17:36:22,385 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 805 transitions. Word has length 57 [2021-12-06 17:36:22,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:36:22,385 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 805 transitions. [2021-12-06 17:36:22,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.6) internal successors, (162), 46 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 805 transitions. [2021-12-06 17:36:22,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 17:36:22,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:36:22,386 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:36:22,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-06 17:36:22,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:36:22,587 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:36:22,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:36:22,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1967721474, now seen corresponding path program 11 times [2021-12-06 17:36:22,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:36:22,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086360317] [2021-12-06 17:36:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:36:22,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:36:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:22,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:36:22,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086360317] [2021-12-06 17:36:22,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086360317] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:36:22,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799947362] [2021-12-06 17:36:22,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:36:22,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:36:22,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:36:22,785 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:36:22,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 17:36:22,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 17:36:22,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:36:22,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 17:36:22,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:36:22,882 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:36:22,882 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 17:36:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:23,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:36:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:23,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799947362] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:36:23,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:36:23,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2021-12-06 17:36:23,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220843203] [2021-12-06 17:36:23,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:36:23,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 17:36:23,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:36:23,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 17:36:23,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1964, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 17:36:23,614 INFO L87 Difference]: Start difference. First operand 720 states and 805 transitions. Second operand has 48 states, 47 states have (on average 3.25531914893617) 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 17:36:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:36:24,826 INFO L93 Difference]: Finished difference Result 1375 states and 1484 transitions. [2021-12-06 17:36:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 17:36:24,826 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.25531914893617) 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 58 [2021-12-06 17:36:24,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:36:24,830 INFO L225 Difference]: With dead ends: 1375 [2021-12-06 17:36:24,830 INFO L226 Difference]: Without dead ends: 1375 [2021-12-06 17:36:24,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1150, Invalid=4702, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 17:36:24,831 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 353 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 2328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:36:24,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 991 Invalid, 2328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:36:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-12-06 17:36:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 738. [2021-12-06 17:36:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 735 states have (on average 1.126530612244898) internal successors, (828), 737 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 828 transitions. [2021-12-06 17:36:24,841 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 828 transitions. Word has length 58 [2021-12-06 17:36:24,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:36:24,841 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 828 transitions. [2021-12-06 17:36:24,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.25531914893617) 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 17:36:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 828 transitions. [2021-12-06 17:36:24,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 17:36:24,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:36:24,842 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:36:24,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 17:36:25,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-06 17:36:25,043 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:36:25,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:36:25,043 INFO L85 PathProgramCache]: Analyzing trace with hash 244902880, now seen corresponding path program 2 times [2021-12-06 17:36:25,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:36:25,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584928601] [2021-12-06 17:36:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:36:25,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:36:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:36:25,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:36:25,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584928601] [2021-12-06 17:36:25,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584928601] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:36:25,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408798938] [2021-12-06 17:36:25,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:36:25,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:36:25,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:36:25,334 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:36:25,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 17:36:25,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:36:25,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:36:25,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-06 17:36:25,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:36:25,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:36:25,602 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 17:36:25,635 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 17:36:25,748 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 17:36:25,793 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 17:36:25,829 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 17:36:25,842 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 17:36:25,867 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 17:36:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:36:25,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:36:25,880 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1411 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1411) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-06 17:36:25,884 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1411 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1411) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:36:25,889 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1411 (Array Int Int)) (v_ArrVal_1410 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1410) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1411) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:36:25,894 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1411 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1411) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:36:25,903 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1411 (Array Int Int)) (v_ArrVal_1409 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1409) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1411) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:36:25,911 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1411 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1411) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:36:25,916 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1411 (Array Int Int)) (v_ArrVal_1408 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1408) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1411) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:36:25,922 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1411 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1411) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 4)) 0)) is different from false [2021-12-06 17:36:25,932 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1411 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1411) |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 17:36:25,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:36:25,937 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 17:36:25,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:36:25,940 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 17:36:25,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:36:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 39 not checked. [2021-12-06 17:36:26,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408798938] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:36:26,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:36:26,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 49 [2021-12-06 17:36:26,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663360761] [2021-12-06 17:36:26,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:36:26,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 17:36:26,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:36:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 17:36:26,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1450, Unknown=9, NotChecked=756, Total=2352 [2021-12-06 17:36:26,105 INFO L87 Difference]: Start difference. First operand 738 states and 828 transitions. Second operand has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 49 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 17:36:26,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:36:26,926 INFO L93 Difference]: Finished difference Result 873 states and 954 transitions. [2021-12-06 17:36:26,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 17:36:26,926 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 49 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-06 17:36:26,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:36:26,929 INFO L225 Difference]: With dead ends: 873 [2021-12-06 17:36:26,929 INFO L226 Difference]: Without dead ends: 825 [2021-12-06 17:36:26,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 93 SyntacticMatches, 13 SemanticMatches, 59 ConstructedPredicates, 9 IntricatePredicates, 1 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=217, Invalid=2462, Unknown=9, NotChecked=972, Total=3660 [2021-12-06 17:36:26,929 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 214 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 2449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1354 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:36:26,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 1233 Invalid, 2449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1076 Invalid, 0 Unknown, 1354 Unchecked, 0.3s Time] [2021-12-06 17:36:26,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-12-06 17:36:26,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 747. [2021-12-06 17:36:26,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 744 states have (on average 1.1155913978494623) internal successors, (830), 746 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:26,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 830 transitions. [2021-12-06 17:36:26,937 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 830 transitions. Word has length 59 [2021-12-06 17:36:26,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:36:26,937 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 830 transitions. [2021-12-06 17:36:26,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 49 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 17:36:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 830 transitions. [2021-12-06 17:36:26,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 17:36:26,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:36:26,938 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:36:26,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 17:36:27,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-06 17:36:27,139 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:36:27,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:36:27,140 INFO L85 PathProgramCache]: Analyzing trace with hash 102819635, now seen corresponding path program 10 times [2021-12-06 17:36:27,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:36:27,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374130274] [2021-12-06 17:36:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:36:27,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:36:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:27,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:36:27,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374130274] [2021-12-06 17:36:27,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374130274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:36:27,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328811051] [2021-12-06 17:36:27,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:36:27,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:36:27,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:36:27,544 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:36:27,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 17:36:27,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:36:27,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:36:27,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 17:36:27,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:36:27,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:36:27,647 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 17:36:27,893 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 17:36:27,930 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 17:36:28,069 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 17:36:28,170 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 17:36:28,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:36:28,367 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 17:36:28,468 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 17:36:28,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:36:28,554 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 17:36:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 37 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:28,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:36:43,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:36:43,198 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 17:36:43,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:36:43,203 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 17:36:43,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:36:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 24 proven. 71 refuted. 22 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:43,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328811051] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:36:43,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:36:43,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 71 [2021-12-06 17:36:43,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497292917] [2021-12-06 17:36:43,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:36:43,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 17:36:43,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:36:43,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 17:36:43,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=4556, Unknown=76, NotChecked=0, Total=4970 [2021-12-06 17:36:43,859 INFO L87 Difference]: Start difference. First operand 747 states and 830 transitions. Second operand has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:45,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:36:45,589 INFO L93 Difference]: Finished difference Result 860 states and 957 transitions. [2021-12-06 17:36:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 17:36:45,590 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have 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 17:36:45,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:36:45,592 INFO L225 Difference]: With dead ends: 860 [2021-12-06 17:36:45,593 INFO L226 Difference]: Without dead ends: 829 [2021-12-06 17:36:45,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2358 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=987, Invalid=10927, Unknown=76, NotChecked=0, Total=11990 [2021-12-06 17:36:45,593 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 290 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 503 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:36:45,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 1803 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 835 Invalid, 0 Unknown, 503 Unchecked, 0.3s Time] [2021-12-06 17:36:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-06 17:36:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 811. [2021-12-06 17:36:45,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 808 states have (on average 1.11509900990099) internal successors, (901), 810 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 901 transitions. [2021-12-06 17:36:45,600 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 901 transitions. Word has length 60 [2021-12-06 17:36:45,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:36:45,600 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 901 transitions. [2021-12-06 17:36:45,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:45,600 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 901 transitions. [2021-12-06 17:36:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 17:36:45,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:36:45,601 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:36:45,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 17:36:45,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:36:45,802 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:36:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:36:45,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1618209099, now seen corresponding path program 12 times [2021-12-06 17:36:45,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:36:45,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164001536] [2021-12-06 17:36:45,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:36:45,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:36:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 33 proven. 123 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:36:46,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:36:46,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164001536] [2021-12-06 17:36:46,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164001536] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:36:46,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239058932] [2021-12-06 17:36:46,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:36:46,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:36:46,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:36:46,015 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:36:46,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 17:36:46,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-06 17:36:46,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:36:46,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 17:36:46,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:36:46,270 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 17:36:46,374 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 17:36:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 33 proven. 123 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:36:46,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:36:46,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 17:36:46,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 17:36:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 33 proven. 123 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:36:46,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239058932] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:36:46,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:36:46,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 36 [2021-12-06 17:36:46,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057855762] [2021-12-06 17:36:46,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:36:46,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 17:36:46,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:36:46,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 17:36:46,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 17:36:46,545 INFO L87 Difference]: Start difference. First operand 811 states and 901 transitions. Second operand has 36 states, 36 states have (on average 2.888888888888889) internal successors, (104), 36 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 17:36:47,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:36:47,385 INFO L93 Difference]: Finished difference Result 1850 states and 1983 transitions. [2021-12-06 17:36:47,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 17:36:47,386 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.888888888888889) internal successors, (104), 36 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-06 17:36:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:36:47,391 INFO L225 Difference]: With dead ends: 1850 [2021-12-06 17:36:47,391 INFO L226 Difference]: Without dead ends: 1827 [2021-12-06 17:36:47,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=2436, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 17:36:47,392 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 323 mSDsluCounter, 1799 mSDsCounter, 0 mSdLazyCounter, 2014 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 2174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:36:47,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 1900 Invalid, 2174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2014 Invalid, 0 Unknown, 76 Unchecked, 0.6s Time] [2021-12-06 17:36:47,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-12-06 17:36:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 959. [2021-12-06 17:36:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 956 states have (on average 1.1161087866108788) internal successors, (1067), 958 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1067 transitions. [2021-12-06 17:36:47,404 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1067 transitions. Word has length 61 [2021-12-06 17:36:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:36:47,404 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 1067 transitions. [2021-12-06 17:36:47,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.888888888888889) internal successors, (104), 36 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 17:36:47,404 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1067 transitions. [2021-12-06 17:36:47,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 17:36:47,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:36:47,405 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:36:47,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-06 17:36:47,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-06 17:36:47,606 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:36:47,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:36:47,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1739829774, now seen corresponding path program 4 times [2021-12-06 17:36:47,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:36:47,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257474868] [2021-12-06 17:36:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:36:47,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:36:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:47,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:36:47,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257474868] [2021-12-06 17:36:47,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257474868] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:36:47,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505495314] [2021-12-06 17:36:47,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:36:47,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:36:47,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:36:47,805 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:36:47,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 17:36:47,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:36:47,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:36:47,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-06 17:36:47,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:36:47,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:36:47,921 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:36:47,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:36:47,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:36:48,080 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 17:36:48,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:36:48,331 INFO L354 Elim1Store]: treesize reduction 6, result has 76.0 percent of original size [2021-12-06 17:36:48,331 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 28 treesize of output 29 [2021-12-06 17:36:48,735 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 17:36:48,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:36:49,385 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 17:36:49,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:36:49,388 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 17:36:49,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:36:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 17:36:49,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505495314] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:36:49,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:36:49,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 50 [2021-12-06 17:36:49,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586309822] [2021-12-06 17:36:49,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:36:49,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 17:36:49,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:36:49,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 17:36:49,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2336, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 17:36:49,869 INFO L87 Difference]: Start difference. First operand 959 states and 1067 transitions. Second operand has 51 states, 50 states have (on average 2.9) internal successors, (145), 51 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 17:36:54,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:36:54,445 INFO L93 Difference]: Finished difference Result 1164 states and 1269 transitions. [2021-12-06 17:36:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-06 17:36:54,445 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.9) internal successors, (145), 51 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 62 [2021-12-06 17:36:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:36:54,448 INFO L225 Difference]: With dead ends: 1164 [2021-12-06 17:36:54,448 INFO L226 Difference]: Without dead ends: 1021 [2021-12-06 17:36:54,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3450 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1383, Invalid=14366, Unknown=1, NotChecked=0, Total=15750 [2021-12-06 17:36:54,449 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 213 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 2320 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 2766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:36:54,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 998 Invalid, 2766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2320 Invalid, 0 Unknown, 359 Unchecked, 0.9s Time] [2021-12-06 17:36:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2021-12-06 17:36:54,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 930. [2021-12-06 17:36:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 927 states have (on average 1.1089536138079827) internal successors, (1028), 929 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1028 transitions. [2021-12-06 17:36:54,457 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1028 transitions. Word has length 62 [2021-12-06 17:36:54,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:36:54,458 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 1028 transitions. [2021-12-06 17:36:54,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.9) internal successors, (145), 51 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 17:36:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1028 transitions. [2021-12-06 17:36:54,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 17:36:54,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:36:54,459 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:36:54,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-06 17:36:54,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:36:54,659 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:36:54,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:36:54,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1394468106, now seen corresponding path program 11 times [2021-12-06 17:36:54,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:36:54,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441268802] [2021-12-06 17:36:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:36:54,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:36:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:54,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:36:54,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441268802] [2021-12-06 17:36:54,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441268802] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:36:54,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413895149] [2021-12-06 17:36:54,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:36:54,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:36:54,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:36:54,867 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:36:54,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 17:36:55,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 17:36:55,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:36:55,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 17:36:55,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:36:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:55,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:36:55,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:36:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:55,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413895149] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:36:55,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:36:55,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 43 [2021-12-06 17:36:55,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301047335] [2021-12-06 17:36:55,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:36:55,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 17:36:55,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:36:55,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 17:36:55,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 17:36:55,752 INFO L87 Difference]: Start difference. First operand 930 states and 1028 transitions. Second operand has 44 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 44 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 17:36:56,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:36:56,513 INFO L93 Difference]: Finished difference Result 1238 states and 1353 transitions. [2021-12-06 17:36:56,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 17:36:56,513 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 44 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 17:36:56,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:36:56,518 INFO L225 Difference]: With dead ends: 1238 [2021-12-06 17:36:56,518 INFO L226 Difference]: Without dead ends: 1238 [2021-12-06 17:36:56,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=898, Invalid=3392, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 17:36:56,519 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 539 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:36:56,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 1153 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:36:56,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-12-06 17:36:56,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1066. [2021-12-06 17:36:56,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1063 states have (on average 1.1175917215428033) internal successors, (1188), 1065 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1188 transitions. [2021-12-06 17:36:56,532 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1188 transitions. Word has length 64 [2021-12-06 17:36:56,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:36:56,533 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 1188 transitions. [2021-12-06 17:36:56,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 44 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 17:36:56,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1188 transitions. [2021-12-06 17:36:56,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 17:36:56,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:36:56,534 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:36:56,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 17:36:56,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-12-06 17:36:56,734 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:36:56,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:36:56,734 INFO L85 PathProgramCache]: Analyzing trace with hash 873906856, now seen corresponding path program 13 times [2021-12-06 17:36:56,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:36:56,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400037491] [2021-12-06 17:36:56,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:36:56,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:36:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 45 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:56,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:36:56,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400037491] [2021-12-06 17:36:56,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400037491] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:36:56,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736467068] [2021-12-06 17:36:56,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:36:56,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:36:56,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:36:56,947 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:36:56,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 17:36:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:36:57,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 17:36:57,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:36:57,048 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:36:57,048 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 17:36:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 66 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:57,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:36:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 91 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:36:58,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736467068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:36:58,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:36:58,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 57 [2021-12-06 17:36:58,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110700] [2021-12-06 17:36:58,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:36:58,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 17:36:58,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:36:58,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 17:36:58,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2939, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 17:36:58,144 INFO L87 Difference]: Start difference. First operand 1066 states and 1188 transitions. Second operand has 58 states, 57 states have (on average 3.2280701754385963) internal successors, (184), 58 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:59,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:36:59,697 INFO L93 Difference]: Finished difference Result 2069 states and 2227 transitions. [2021-12-06 17:36:59,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 17:36:59,697 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.2280701754385963) internal successors, (184), 58 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-06 17:36:59,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:36:59,704 INFO L225 Difference]: With dead ends: 2069 [2021-12-06 17:36:59,704 INFO L226 Difference]: Without dead ends: 2069 [2021-12-06 17:36:59,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1511, Invalid=6679, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 17:36:59,705 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 625 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:36:59,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 1014 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 17:36:59,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-12-06 17:36:59,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1087. [2021-12-06 17:36:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1084 states have (on average 1.1208487084870848) internal successors, (1215), 1086 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:59,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1215 transitions. [2021-12-06 17:36:59,718 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1215 transitions. Word has length 65 [2021-12-06 17:36:59,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:36:59,718 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 1215 transitions. [2021-12-06 17:36:59,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.2280701754385963) internal successors, (184), 58 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:36:59,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1215 transitions. [2021-12-06 17:36:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 17:36:59,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:36:59,719 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:36:59,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 17:36:59,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:36:59,921 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:36:59,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:36:59,922 INFO L85 PathProgramCache]: Analyzing trace with hash 828941765, now seen corresponding path program 3 times [2021-12-06 17:36:59,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:36:59,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750229338] [2021-12-06 17:36:59,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:36:59,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:36:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:37:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:37:00,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:37:00,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750229338] [2021-12-06 17:37:00,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750229338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:37:00,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090623028] [2021-12-06 17:37:00,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:37:00,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:37:00,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:37:00,357 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:37:00,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 17:37:00,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 17:37:00,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:37:00,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-06 17:37:00,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:37:00,624 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 10 treesize of output 8 [2021-12-06 17:37:00,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 17:37:00,891 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 17:37:01,008 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 17:37:01,060 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 17:37:01,103 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 17:37:01,142 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 17:37:01,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 17:37:01,227 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 17:37:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:37:01,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:37:01,240 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1777 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1777) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-06 17:37:01,246 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1777 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1777) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:37:01,251 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1777 (Array Int Int)) (v_ArrVal_1776 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1776) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1777) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:37:01,256 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1777 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1777) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:37:01,262 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1777 (Array Int Int)) (v_ArrVal_1775 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1775) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1777) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:37:01,267 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1777 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1777) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:37:01,272 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1777 (Array Int Int)) (v_ArrVal_1774 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1774) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1777) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:37:01,277 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1777 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1777) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 4)))) is different from false [2021-12-06 17:37:01,281 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1777 (Array Int Int)) (v_ArrVal_1773 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1773) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1777) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 4)) 0)) is different from false [2021-12-06 17:37:01,286 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1777 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1777) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:37:01,302 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1777 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1777) |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 17:37:01,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:37:01,308 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 17:37:01,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:37:01,311 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 17:37:01,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:37:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 59 not checked. [2021-12-06 17:37:01,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090623028] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:37:01,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:37:01,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 58 [2021-12-06 17:37:01,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759400129] [2021-12-06 17:37:01,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:37:01,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 17:37:01,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:37:01,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 17:37:01,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2031, Unknown=11, NotChecked=1100, Total=3306 [2021-12-06 17:37:01,492 INFO L87 Difference]: Start difference. First operand 1087 states and 1215 transitions. Second operand has 58 states, 58 states have (on average 2.5689655172413794) internal successors, (149), 58 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 17:37:02,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:37:02,778 INFO L93 Difference]: Finished difference Result 1253 states and 1370 transitions. [2021-12-06 17:37:02,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 17:37:02,779 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.5689655172413794) internal successors, (149), 58 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 67 [2021-12-06 17:37:02,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:37:02,782 INFO L225 Difference]: With dead ends: 1253 [2021-12-06 17:37:02,782 INFO L226 Difference]: Without dead ends: 1148 [2021-12-06 17:37:02,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 104 SyntacticMatches, 14 SemanticMatches, 72 ConstructedPredicates, 11 IntricatePredicates, 2 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=269, Invalid=3670, Unknown=11, NotChecked=1452, Total=5402 [2021-12-06 17:37:02,783 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 196 mSDsluCounter, 2334 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 4208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1996 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:37:02,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 2440 Invalid, 4208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2190 Invalid, 0 Unknown, 1996 Unchecked, 0.6s Time] [2021-12-06 17:37:02,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-12-06 17:37:02,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1032. [2021-12-06 17:37:02,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1029 states have (on average 1.1098153547133138) internal successors, (1142), 1031 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1142 transitions. [2021-12-06 17:37:02,793 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1142 transitions. Word has length 67 [2021-12-06 17:37:02,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:37:02,793 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 1142 transitions. [2021-12-06 17:37:02,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.5689655172413794) internal successors, (149), 58 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 17:37:02,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1142 transitions. [2021-12-06 17:37:02,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 17:37:02,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:37:02,794 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 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 17:37:02,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 17:37:02,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-12-06 17:37:02,995 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:37:02,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:37:02,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2066697040, now seen corresponding path program 5 times [2021-12-06 17:37:02,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:37:02,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393645104] [2021-12-06 17:37:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:37:02,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:37:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:37:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 28 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:03,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:37:03,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393645104] [2021-12-06 17:37:03,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393645104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:37:03,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694452114] [2021-12-06 17:37:03,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:37:03,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:37:03,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:37:03,225 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:37:03,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 17:37:03,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 17:37:03,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:37:03,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 17:37:03,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:37:03,348 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:37:03,349 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 17:37:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:03,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:37:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 67 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:04,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694452114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:37:04,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:37:04,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 53 [2021-12-06 17:37:04,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277922548] [2021-12-06 17:37:04,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:37:04,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 17:37:04,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:37:04,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 17:37:04,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=2514, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 17:37:04,312 INFO L87 Difference]: Start difference. First operand 1032 states and 1142 transitions. Second operand has 54 states, 53 states have (on average 3.4150943396226414) internal successors, (181), 54 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 17:37:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:37:07,051 INFO L93 Difference]: Finished difference Result 1746 states and 1864 transitions. [2021-12-06 17:37:07,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 17:37:07,052 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 3.4150943396226414) internal successors, (181), 54 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 67 [2021-12-06 17:37:07,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:37:07,057 INFO L225 Difference]: With dead ends: 1746 [2021-12-06 17:37:07,057 INFO L226 Difference]: Without dead ends: 1632 [2021-12-06 17:37:07,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2719, Invalid=10163, Unknown=0, NotChecked=0, Total=12882 [2021-12-06 17:37:07,058 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 735 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 2370 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 2533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:37:07,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 969 Invalid, 2533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2370 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 17:37:07,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-12-06 17:37:07,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 973. [2021-12-06 17:37:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 970 states have (on average 1.1020618556701032) internal successors, (1069), 972 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1069 transitions. [2021-12-06 17:37:07,068 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1069 transitions. Word has length 67 [2021-12-06 17:37:07,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:37:07,068 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1069 transitions. [2021-12-06 17:37:07,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 3.4150943396226414) internal successors, (181), 54 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 17:37:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1069 transitions. [2021-12-06 17:37:07,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 17:37:07,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:37:07,069 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:37:07,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-06 17:37:07,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-12-06 17:37:07,269 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:37:07,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:37:07,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1532583327, now seen corresponding path program 14 times [2021-12-06 17:37:07,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:37:07,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046241540] [2021-12-06 17:37:07,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:37:07,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:37:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:37:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 38 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:37:07,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:37:07,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046241540] [2021-12-06 17:37:07,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046241540] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:37:07,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038168046] [2021-12-06 17:37:07,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:37:07,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:37:07,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:37:07,476 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:37:07,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 17:37:07,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:37:07,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:37:07,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 17:37:07,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:37:07,808 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 17:37:08,037 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 17:37:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 38 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:37:08,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:37:08,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 17:37:08,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 17:37:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 38 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:37:08,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038168046] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:37:08,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:37:08,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 56 [2021-12-06 17:37:08,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219385328] [2021-12-06 17:37:08,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:37:08,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 17:37:08,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:37:08,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 17:37:08,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2871, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 17:37:08,550 INFO L87 Difference]: Start difference. First operand 973 states and 1069 transitions. Second operand has 56 states, 56 states have (on average 2.8392857142857144) internal successors, (159), 56 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:09,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:37:09,770 INFO L93 Difference]: Finished difference Result 2220 states and 2365 transitions. [2021-12-06 17:37:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 17:37:09,770 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.8392857142857144) internal successors, (159), 56 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-06 17:37:09,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:37:09,777 INFO L225 Difference]: With dead ends: 2220 [2021-12-06 17:37:09,777 INFO L226 Difference]: Without dead ends: 2168 [2021-12-06 17:37:09,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=488, Invalid=5062, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 17:37:09,777 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 436 mSDsluCounter, 2548 mSDsCounter, 0 mSdLazyCounter, 2594 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 2663 SdHoareTripleChecker+Invalid, 2784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:37:09,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 2663 Invalid, 2784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2594 Invalid, 0 Unknown, 79 Unchecked, 0.7s Time] [2021-12-06 17:37:09,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-12-06 17:37:09,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1131. [2021-12-06 17:37:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1128 states have (on average 1.1037234042553192) internal successors, (1245), 1130 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:09,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1245 transitions. [2021-12-06 17:37:09,788 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1245 transitions. Word has length 68 [2021-12-06 17:37:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:37:09,788 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1245 transitions. [2021-12-06 17:37:09,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.8392857142857144) internal successors, (159), 56 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1245 transitions. [2021-12-06 17:37:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 17:37:09,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:37:09,789 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:37:09,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 17:37:09,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:37:09,991 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:37:09,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:37:09,992 INFO L85 PathProgramCache]: Analyzing trace with hash -404858498, now seen corresponding path program 12 times [2021-12-06 17:37:09,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:37:09,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655121345] [2021-12-06 17:37:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:37:09,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:37:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:37:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 14 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:10,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:37:10,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655121345] [2021-12-06 17:37:10,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655121345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:37:10,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574770287] [2021-12-06 17:37:10,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:37:10,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:37:10,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:37:10,522 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:37:10,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 17:37:10,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 17:37:10,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:37:10,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 167 conjunts are in the unsatisfiable core [2021-12-06 17:37:10,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:37:10,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:37:11,177 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 17:37:11,223 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 17:37:11,351 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 17:37:11,458 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 17:37:11,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:37:11,694 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 17:37:11,820 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 17:37:11,937 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 17:37:12,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:12,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:37:12,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-06 17:37:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 14 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:12,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:37:12,060 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1958 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1958) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-06 17:37:12,065 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1958 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1958) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:37:12,070 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1958 (Array Int Int)) (v_ArrVal_1957 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1957) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1958) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:37:12,075 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1958 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1958) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:37:12,080 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1956 (Array Int Int)) (v_ArrVal_1958 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1956) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1958) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:37:12,085 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1958 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1958) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:37:12,091 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1955 (Array Int Int)) (v_ArrVal_1958 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1955) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1958) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:37:12,096 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1958 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1958) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 4)) 0)) is different from false [2021-12-06 17:37:12,101 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1954 (Array Int Int)) (v_ArrVal_1958 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1954) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1958) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 4)) 0)) is different from false [2021-12-06 17:37:12,107 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1958 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1958) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:37:12,111 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1953 (Array Int Int)) (v_ArrVal_1958 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1953) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1958) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:37:12,117 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1958 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1958) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:37:12,124 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1958 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1958) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)) is different from false [2021-12-06 17:37:12,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:37:12,129 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 17:37:12,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:37:12,133 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 17:37:12,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:37:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 14 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 83 not checked. [2021-12-06 17:37:12,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574770287] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:37:12,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:37:12,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 27, 27] total 79 [2021-12-06 17:37:12,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126890912] [2021-12-06 17:37:12,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:37:12,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-06 17:37:12,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:37:12,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-06 17:37:12,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=4087, Unknown=13, NotChecked=1820, Total=6162 [2021-12-06 17:37:12,529 INFO L87 Difference]: Start difference. First operand 1131 states and 1245 transitions. Second operand has 79 states, 79 states have (on average 2.3164556962025316) internal successors, (183), 79 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:13,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:37:13,742 INFO L93 Difference]: Finished difference Result 1318 states and 1448 transitions. [2021-12-06 17:37:13,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 17:37:13,742 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.3164556962025316) internal successors, (183), 79 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have 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 17:37:13,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:37:13,746 INFO L225 Difference]: With dead ends: 1318 [2021-12-06 17:37:13,746 INFO L226 Difference]: Without dead ends: 1227 [2021-12-06 17:37:13,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 13 IntricatePredicates, 7 DeprecatedPredicates, 2124 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=389, Invalid=6960, Unknown=13, NotChecked=2340, Total=9702 [2021-12-06 17:37:13,747 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 143 mSDsluCounter, 2147 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2207 SdHoareTripleChecker+Invalid, 2352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1467 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:37:13,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2207 Invalid, 2352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 877 Invalid, 0 Unknown, 1467 Unchecked, 0.3s Time] [2021-12-06 17:37:13,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-12-06 17:37:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1213. [2021-12-06 17:37:13,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1210 states have (on average 1.1041322314049586) internal successors, (1336), 1212 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1336 transitions. [2021-12-06 17:37:13,754 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1336 transitions. Word has length 68 [2021-12-06 17:37:13,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:37:13,755 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 1336 transitions. [2021-12-06 17:37:13,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.3164556962025316) internal successors, (183), 79 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:13,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1336 transitions. [2021-12-06 17:37:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 17:37:13,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:37:13,756 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:37:13,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-06 17:37:13,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-06 17:37:13,957 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:37:13,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:37:13,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1922758244, now seen corresponding path program 15 times [2021-12-06 17:37:13,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:37:13,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758144207] [2021-12-06 17:37:13,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:37:13,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:37:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:37:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 66 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:14,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:37:14,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758144207] [2021-12-06 17:37:14,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758144207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:37:14,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236912396] [2021-12-06 17:37:14,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:37:14,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:37:14,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:37:14,200 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:37:14,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 17:37:14,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-06 17:37:14,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:37:14,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 17:37:14,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:37:14,375 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:37:14,375 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 17:37:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 91 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:14,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:37:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 120 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:15,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236912396] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:37:15,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:37:15,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 64 [2021-12-06 17:37:15,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934855984] [2021-12-06 17:37:15,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:37:15,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 17:37:15,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:37:15,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 17:37:15,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=3634, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 17:37:15,673 INFO L87 Difference]: Start difference. First operand 1213 states and 1336 transitions. Second operand has 65 states, 64 states have (on average 3.21875) internal successors, (206), 65 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:17,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:37:17,427 INFO L93 Difference]: Finished difference Result 2333 states and 2498 transitions. [2021-12-06 17:37:17,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 17:37:17,428 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.21875) internal successors, (206), 65 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-06 17:37:17,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:37:17,432 INFO L225 Difference]: With dead ends: 2333 [2021-12-06 17:37:17,432 INFO L226 Difference]: Without dead ends: 2333 [2021-12-06 17:37:17,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2010 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2007, Invalid=8295, Unknown=0, NotChecked=0, Total=10302 [2021-12-06 17:37:17,433 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 810 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:37:17,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 811 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:37:17,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-12-06 17:37:17,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1234. [2021-12-06 17:37:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1231 states have (on average 1.107229894394801) internal successors, (1363), 1233 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:17,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1363 transitions. [2021-12-06 17:37:17,448 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1363 transitions. Word has length 72 [2021-12-06 17:37:17,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:37:17,449 INFO L470 AbstractCegarLoop]: Abstraction has 1234 states and 1363 transitions. [2021-12-06 17:37:17,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.21875) internal successors, (206), 65 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:17,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1363 transitions. [2021-12-06 17:37:17,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 17:37:17,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:37:17,450 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:37:17,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-06 17:37:17,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:37:17,651 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:37:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:37:17,652 INFO L85 PathProgramCache]: Analyzing trace with hash -807593407, now seen corresponding path program 13 times [2021-12-06 17:37:17,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:37:17,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969732596] [2021-12-06 17:37:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:37:17,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:37:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:37:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:17,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:37:17,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969732596] [2021-12-06 17:37:17,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969732596] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:37:17,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718161185] [2021-12-06 17:37:17,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:37:17,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:37:17,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:37:17,881 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:37:17,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 17:37:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:37:17,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-06 17:37:17,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:37:17,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:37:17,991 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 17:37:17,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:37:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:18,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:37:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 91 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:19,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718161185] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:37:19,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:37:19,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 56 [2021-12-06 17:37:19,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088618264] [2021-12-06 17:37:19,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:37:19,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-06 17:37:19,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:37:19,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-06 17:37:19,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=2881, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 17:37:19,121 INFO L87 Difference]: Start difference. First operand 1234 states and 1363 transitions. Second operand has 57 states, 56 states have (on average 3.6785714285714284) internal successors, (206), 57 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:20,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:37:20,675 INFO L93 Difference]: Finished difference Result 1646 states and 1799 transitions. [2021-12-06 17:37:20,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 17:37:20,676 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.6785714285714284) internal successors, (206), 57 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-06 17:37:20,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:37:20,679 INFO L225 Difference]: With dead ends: 1646 [2021-12-06 17:37:20,679 INFO L226 Difference]: Without dead ends: 1646 [2021-12-06 17:37:20,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1566, Invalid=7176, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 17:37:20,680 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 767 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:37:20,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 1262 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:37:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-12-06 17:37:20,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1350. [2021-12-06 17:37:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1347 states have (on average 1.1202672605790647) internal successors, (1509), 1349 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 1509 transitions. [2021-12-06 17:37:20,695 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 1509 transitions. Word has length 72 [2021-12-06 17:37:20,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:37:20,695 INFO L470 AbstractCegarLoop]: Abstraction has 1350 states and 1509 transitions. [2021-12-06 17:37:20,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.6785714285714284) internal successors, (206), 57 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 1509 transitions. [2021-12-06 17:37:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 17:37:20,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:37:20,696 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:37:20,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-06 17:37:20,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:37:20,897 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:37:20,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:37:20,899 INFO L85 PathProgramCache]: Analyzing trace with hash 532989117, now seen corresponding path program 6 times [2021-12-06 17:37:20,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:37:20,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772675840] [2021-12-06 17:37:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:37:20,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:37:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:37:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 28 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:21,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:37:21,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772675840] [2021-12-06 17:37:21,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772675840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:37:21,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162281623] [2021-12-06 17:37:21,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:37:21,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:37:21,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:37:21,119 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:37:21,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 17:37:21,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 17:37:21,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:37:21,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 17:37:21,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:37:21,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:37:21,396 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 17:37:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 50 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:22,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:37:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 67 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:23,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162281623] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:37:23,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:37:23,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2021-12-06 17:37:23,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678926818] [2021-12-06 17:37:23,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:37:23,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 17:37:23,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:37:23,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 17:37:23,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=3045, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 17:37:23,113 INFO L87 Difference]: Start difference. First operand 1350 states and 1509 transitions. Second operand has 59 states, 58 states have (on average 3.5517241379310347) internal successors, (206), 59 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:26,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:37:26,045 INFO L93 Difference]: Finished difference Result 1672 states and 1831 transitions. [2021-12-06 17:37:26,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-06 17:37:26,046 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 3.5517241379310347) internal successors, (206), 59 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-06 17:37:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:37:26,047 INFO L225 Difference]: With dead ends: 1672 [2021-12-06 17:37:26,047 INFO L226 Difference]: Without dead ends: 1672 [2021-12-06 17:37:26,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 111 SyntacticMatches, 7 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4485 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1858, Invalid=14398, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 17:37:26,048 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 233 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 666 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:37:26,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 787 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 844 Invalid, 0 Unknown, 666 Unchecked, 0.3s Time] [2021-12-06 17:37:26,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-12-06 17:37:26,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1340. [2021-12-06 17:37:26,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1337 states have (on average 1.1211667913238594) internal successors, (1499), 1339 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:26,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1499 transitions. [2021-12-06 17:37:26,060 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1499 transitions. Word has length 72 [2021-12-06 17:37:26,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:37:26,060 INFO L470 AbstractCegarLoop]: Abstraction has 1340 states and 1499 transitions. [2021-12-06 17:37:26,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 3.5517241379310347) internal successors, (206), 59 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:26,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1499 transitions. [2021-12-06 17:37:26,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 17:37:26,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:37:26,062 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:37:26,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-06 17:37:26,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-06 17:37:26,263 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:37:26,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:37:26,264 INFO L85 PathProgramCache]: Analyzing trace with hash 734408190, now seen corresponding path program 3 times [2021-12-06 17:37:26,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:37:26,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143431127] [2021-12-06 17:37:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:37:26,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:37:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:37:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 45 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:26,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:37:26,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143431127] [2021-12-06 17:37:26,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143431127] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:37:26,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300084895] [2021-12-06 17:37:26,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:37:26,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:37:26,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:37:26,506 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:37:26,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 17:37:26,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 17:37:26,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:37:26,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 17:37:26,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:37:27,011 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:37:27,011 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 17:37:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 66 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:27,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:37:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:28,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300084895] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:37:28,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:37:28,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 57 [2021-12-06 17:37:28,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603609464] [2021-12-06 17:37:28,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:37:28,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 17:37:28,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:37:28,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 17:37:28,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=2892, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 17:37:28,145 INFO L87 Difference]: Start difference. First operand 1340 states and 1499 transitions. Second operand has 58 states, 57 states have (on average 3.6842105263157894) internal successors, (210), 58 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 17:37:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:37:30,921 INFO L93 Difference]: Finished difference Result 1789 states and 1950 transitions. [2021-12-06 17:37:30,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 17:37:30,922 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.6842105263157894) internal successors, (210), 58 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 73 [2021-12-06 17:37:30,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:37:30,923 INFO L225 Difference]: With dead ends: 1789 [2021-12-06 17:37:30,923 INFO L226 Difference]: Without dead ends: 1789 [2021-12-06 17:37:30,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2987, Invalid=10353, Unknown=0, NotChecked=0, Total=13340 [2021-12-06 17:37:30,924 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1284 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:37:30,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1284 Valid, 829 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:37:30,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2021-12-06 17:37:30,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1348. [2021-12-06 17:37:30,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1345 states have (on average 1.121189591078067) internal successors, (1508), 1347 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1508 transitions. [2021-12-06 17:37:30,938 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1508 transitions. Word has length 73 [2021-12-06 17:37:30,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:37:30,938 INFO L470 AbstractCegarLoop]: Abstraction has 1348 states and 1508 transitions. [2021-12-06 17:37:30,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.6842105263157894) internal successors, (210), 58 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 17:37:30,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1508 transitions. [2021-12-06 17:37:30,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 17:37:30,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:37:30,940 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:37:30,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-06 17:37:31,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-12-06 17:37:31,141 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:37:31,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:37:31,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1087961819, now seen corresponding path program 16 times [2021-12-06 17:37:31,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:37:31,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137305651] [2021-12-06 17:37:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:37:31,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:37:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:37:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 43 proven. 220 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:37:31,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:37:31,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137305651] [2021-12-06 17:37:31,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137305651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:37:31,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038810499] [2021-12-06 17:37:31,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:37:31,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:37:31,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:37:31,399 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:37:31,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 17:37:31,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:37:31,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:37:31,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 17:37:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:37:31,793 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 17:37:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 43 proven. 220 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:37:34,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:37:36,444 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 149 treesize of output 129 [2021-12-06 17:37:36,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:37:36,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 245 treesize of output 207 [2021-12-06 17:37:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 145 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:37:37,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038810499] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:37:37,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:37:37,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 41, 44] total 102 [2021-12-06 17:37:37,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142891928] [2021-12-06 17:37:37,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:37:37,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-12-06 17:37:37,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:37:37,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-12-06 17:37:37,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1054, Invalid=9248, Unknown=0, NotChecked=0, Total=10302 [2021-12-06 17:37:37,781 INFO L87 Difference]: Start difference. First operand 1348 states and 1508 transitions. Second operand has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:40,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:37:40,790 INFO L93 Difference]: Finished difference Result 1952 states and 2186 transitions. [2021-12-06 17:37:40,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-12-06 17:37:40,791 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-06 17:37:40,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:37:40,793 INFO L225 Difference]: With dead ends: 1952 [2021-12-06 17:37:40,793 INFO L226 Difference]: Without dead ends: 1891 [2021-12-06 17:37:40,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7266 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2360, Invalid=22132, Unknown=0, NotChecked=0, Total=24492 [2021-12-06 17:37:40,794 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 251 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:37:40,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 655 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 946 Invalid, 0 Unknown, 204 Unchecked, 0.3s Time] [2021-12-06 17:37:40,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-12-06 17:37:40,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1818. [2021-12-06 17:37:40,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1815 states have (on average 1.1289256198347108) internal successors, (2049), 1817 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:40,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 2049 transitions. [2021-12-06 17:37:40,806 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 2049 transitions. Word has length 75 [2021-12-06 17:37:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:37:40,806 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 2049 transitions. [2021-12-06 17:37:40,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:37:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 2049 transitions. [2021-12-06 17:37:40,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 17:37:40,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:37:40,808 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:37:40,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-06 17:37:41,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:37:41,009 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:37:41,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:37:41,010 INFO L85 PathProgramCache]: Analyzing trace with hash -215271382, now seen corresponding path program 4 times [2021-12-06 17:37:41,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:37:41,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811838227] [2021-12-06 17:37:41,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:37:41,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:37:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:37:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 14 proven. 150 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:37:41,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:37:41,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811838227] [2021-12-06 17:37:41,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811838227] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:37:41,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347648632] [2021-12-06 17:37:41,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:37:41,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:37:41,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:37:41,559 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:37:41,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 17:37:41,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:37:41,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:37:41,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-06 17:37:41,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:37:41,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:37:41,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 17:37:42,072 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 17:37:42,117 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 17:37:44,369 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 17:37:44,562 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 17:37:50,746 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 17:37:54,886 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 17:37:59,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 17:38:04,096 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 17:38:04,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:38:04,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-12-06 17:38:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 49 proven. 105 refuted. 10 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:38:04,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:38:31,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:38:31,622 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 17:38:31,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:38:31,628 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 17:38:31,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:38:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 39 proven. 95 refuted. 30 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:38:32,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347648632] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:38:32,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:38:32,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26, 26] total 79 [2021-12-06 17:38:32,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004389700] [2021-12-06 17:38:32,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:38:32,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-06 17:38:32,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:38:32,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-06 17:38:32,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=5649, Unknown=104, NotChecked=0, Total=6162 [2021-12-06 17:38:32,554 INFO L87 Difference]: Start difference. First operand 1818 states and 2049 transitions. Second operand has 79 states, 79 states have (on average 2.5822784810126582) internal successors, (204), 79 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:38:49,459 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 43 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 17:39:09,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:09,772 INFO L93 Difference]: Finished difference Result 2050 states and 2291 transitions. [2021-12-06 17:39:09,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 17:39:09,772 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.5822784810126582) internal successors, (204), 79 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have 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 17:39:09,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:09,774 INFO L225 Difference]: With dead ends: 2050 [2021-12-06 17:39:09,774 INFO L226 Difference]: Without dead ends: 1964 [2021-12-06 17:39:09,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3273 ImplicationChecksByTransitivity, 86.4s TimeCoverageRelationStatistics Valid=1288, Invalid=14599, Unknown=115, NotChecked=0, Total=16002 [2021-12-06 17:39:09,775 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 293 mSDsluCounter, 2226 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:09,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 2294 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1310 Invalid, 0 Unknown, 350 Unchecked, 0.5s Time] [2021-12-06 17:39:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-12-06 17:39:09,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1792. [2021-12-06 17:39:09,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1789 states have (on average 1.1162660704304082) internal successors, (1997), 1791 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 17:39:09,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 1997 transitions. [2021-12-06 17:39:09,791 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 1997 transitions. Word has length 75 [2021-12-06 17:39:09,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:09,791 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 1997 transitions. [2021-12-06 17:39:09,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.5822784810126582) internal successors, (204), 79 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:39:09,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 1997 transitions. [2021-12-06 17:39:09,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 17:39:09,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:09,793 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:09,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 17:39:09,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:39:09,994 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:39:09,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:09,994 INFO L85 PathProgramCache]: Analyzing trace with hash 191019849, now seen corresponding path program 14 times [2021-12-06 17:39:09,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:39:09,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677639243] [2021-12-06 17:39:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:09,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:39:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 16 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:39:10,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:39:10,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677639243] [2021-12-06 17:39:10,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677639243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:10,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655817887] [2021-12-06 17:39:10,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:39:10,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:39:10,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:39:10,687 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:39:10,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-06 17:39:10,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:39:10,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:39:10,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 150 conjunts are in the unsatisfiable core [2021-12-06 17:39:10,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:11,270 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 17:39:11,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:11,327 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 22 treesize of output 21 [2021-12-06 17:39:11,578 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-06 17:39:11,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2021-12-06 17:39:11,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:11,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:39:11,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-12-06 17:39:11,814 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 24 treesize of output 24 [2021-12-06 17:39:11,965 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 24 treesize of output 24 [2021-12-06 17:39:12,120 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 24 treesize of output 24 [2021-12-06 17:39:12,279 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 24 treesize of output 24 [2021-12-06 17:39:12,423 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 24 treesize of output 24 [2021-12-06 17:39:12,560 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 24 treesize of output 24 [2021-12-06 17:39:12,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:39:12,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:39:12,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:39:12,684 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 25 treesize of output 14 [2021-12-06 17:39:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 16 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:39:12,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:12,697 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2465) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-06 17:39:12,702 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2465) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:39:12,709 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int)) (v_ArrVal_2464 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2464) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2465) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:39:12,716 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2465) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:39:12,722 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int)) (v_ArrVal_2463 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2463) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2465) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:39:12,728 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2465) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:39:12,733 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int)) (v_ArrVal_2462 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2462) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2465) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:39:12,739 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2465) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 4)) 0)) is different from false [2021-12-06 17:39:12,745 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int)) (v_ArrVal_2461 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2461) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2465) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 4)) 0)) is different from false [2021-12-06 17:39:12,750 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2465) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:39:12,756 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int)) (v_ArrVal_2460 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2460) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2465) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:39:12,762 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2465) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:39:12,767 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2465 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2465) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) (= 0 |c_ULTIMATE.start_cstrcat_#t~mem6#1|)) is different from false [2021-12-06 17:39:12,772 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2459 (Array Int Int)) (v_ArrVal_2465 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2459) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2465) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) (= 0 |c_ULTIMATE.start_cstrcat_#t~mem6#1|)) is different from false [2021-12-06 17:39:12,778 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2459 (Array Int Int)) (v_ArrVal_2465 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2459) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2465) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|) |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|) 0)) is different from false [2021-12-06 17:39:12,784 WARN L838 $PredicateComparison]: unable to prove that (or (= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|)) (forall ((v_ArrVal_2465 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_2465) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 7 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0))) is different from false [2021-12-06 17:39:12,796 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_2465 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2465) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) is different from false [2021-12-06 17:39:12,802 WARN L838 $PredicateComparison]: unable to prove that (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length3~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (forall ((v_ArrVal_2465 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2465) |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 17:39:12,817 INFO L354 Elim1Store]: treesize reduction 23, result has 46.5 percent of original size [2021-12-06 17:39:12,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 73 [2021-12-06 17:39:12,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:39:12,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:39:12,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:39:12,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2021-12-06 17:39:12,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:39:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 111 not checked. [2021-12-06 17:39:13,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655817887] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:39:13,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:39:13,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 34, 34] total 96 [2021-12-06 17:39:13,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936534563] [2021-12-06 17:39:13,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:13,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-06 17:39:13,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:39:13,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-06 17:39:13,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=5779, Unknown=18, NotChecked=3042, Total=9120 [2021-12-06 17:39:13,844 INFO L87 Difference]: Start difference. First operand 1792 states and 1997 transitions. Second operand has 96 states, 96 states have (on average 2.1666666666666665) internal successors, (208), 96 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 17:39:17,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:17,593 INFO L93 Difference]: Finished difference Result 2287 states and 2558 transitions. [2021-12-06 17:39:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-06 17:39:17,593 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.1666666666666665) internal successors, (208), 96 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 76 [2021-12-06 17:39:17,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:17,595 INFO L225 Difference]: With dead ends: 2287 [2021-12-06 17:39:17,595 INFO L226 Difference]: Without dead ends: 2164 [2021-12-06 17:39:17,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 97 SyntacticMatches, 30 SemanticMatches, 137 ConstructedPredicates, 18 IntricatePredicates, 2 DeprecatedPredicates, 4740 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=637, Invalid=13937, Unknown=18, NotChecked=4590, Total=19182 [2021-12-06 17:39:17,596 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 288 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 2712 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 2639 SdHoareTripleChecker+Invalid, 6555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3801 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:17,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 2639 Invalid, 6555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2712 Invalid, 0 Unknown, 3801 Unchecked, 1.0s Time] [2021-12-06 17:39:17,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2164 states. [2021-12-06 17:39:17,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2164 to 2065. [2021-12-06 17:39:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2062 states have (on average 1.1197866149369544) internal successors, (2309), 2064 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:39:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 2309 transitions. [2021-12-06 17:39:17,611 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 2309 transitions. Word has length 76 [2021-12-06 17:39:17,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:17,611 INFO L470 AbstractCegarLoop]: Abstraction has 2065 states and 2309 transitions. [2021-12-06 17:39:17,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.1666666666666665) internal successors, (208), 96 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 17:39:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 2309 transitions. [2021-12-06 17:39:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 17:39:17,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:17,613 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:17,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-06 17:39:17,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:39:17,814 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:39:17,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:17,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1232398120, now seen corresponding path program 7 times [2021-12-06 17:39:17,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:39:17,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437280026] [2021-12-06 17:39:17,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:17,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:39:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 16 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:39:18,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:39:18,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437280026] [2021-12-06 17:39:18,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437280026] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:18,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195579382] [2021-12-06 17:39:18,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:39:18,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:39:18,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:39:18,090 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:39:18,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-06 17:39:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:18,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 17:39:18,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:18,221 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:39:18,222 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 17:39:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 34 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:39:18,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:39:19,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195579382] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:39:19,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:39:19,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 62 [2021-12-06 17:39:19,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971623840] [2021-12-06 17:39:19,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:19,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 17:39:19,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:39:19,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 17:39:19,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=3507, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 17:39:19,881 INFO L87 Difference]: Start difference. First operand 2065 states and 2309 transitions. Second operand has 63 states, 62 states have (on average 3.5) internal successors, (217), 63 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 17:39:25,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:25,003 INFO L93 Difference]: Finished difference Result 2948 states and 3195 transitions. [2021-12-06 17:39:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-12-06 17:39:25,003 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.5) internal successors, (217), 63 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 76 [2021-12-06 17:39:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:25,005 INFO L225 Difference]: With dead ends: 2948 [2021-12-06 17:39:25,006 INFO L226 Difference]: Without dead ends: 2788 [2021-12-06 17:39:25,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4963 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4609, Invalid=16853, Unknown=0, NotChecked=0, Total=21462 [2021-12-06 17:39:25,007 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 1308 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 2973 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 2973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:25,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1308 Valid, 1242 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 2973 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 17:39:25,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2788 states. [2021-12-06 17:39:25,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2788 to 2087. [2021-12-06 17:39:25,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2084 states have (on average 1.1108445297504799) internal successors, (2315), 2086 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:39:25,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 2315 transitions. [2021-12-06 17:39:25,024 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 2315 transitions. Word has length 76 [2021-12-06 17:39:25,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:25,024 INFO L470 AbstractCegarLoop]: Abstraction has 2087 states and 2315 transitions. [2021-12-06 17:39:25,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.5) internal successors, (217), 63 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 17:39:25,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 2315 transitions. [2021-12-06 17:39:25,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 17:39:25,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:25,026 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:25,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-06 17:39:25,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:39:25,227 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:39:25,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:25,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1489111308, now seen corresponding path program 15 times [2021-12-06 17:39:25,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:39:25,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648559880] [2021-12-06 17:39:25,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:25,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:39:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 66 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:39:25,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:39:25,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648559880] [2021-12-06 17:39:25,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648559880] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:25,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792084717] [2021-12-06 17:39:25,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:39:25,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:39:25,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:39:25,518 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:39:25,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 17:39:25,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 17:39:25,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:39:25,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 17:39:25,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 91 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:39:26,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:26,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 17:39:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 91 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:39:26,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792084717] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:39:26,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:39:26,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 55 [2021-12-06 17:39:26,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967667042] [2021-12-06 17:39:26,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:26,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 17:39:26,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:39:26,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 17:39:26,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=2666, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 17:39:26,796 INFO L87 Difference]: Start difference. First operand 2087 states and 2315 transitions. Second operand has 56 states, 55 states have (on average 3.5272727272727273) internal successors, (194), 56 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:39:27,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:27,960 INFO L93 Difference]: Finished difference Result 2409 states and 2630 transitions. [2021-12-06 17:39:27,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 17:39:27,960 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 3.5272727272727273) internal successors, (194), 56 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-06 17:39:27,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:27,962 INFO L225 Difference]: With dead ends: 2409 [2021-12-06 17:39:27,962 INFO L226 Difference]: Without dead ends: 2409 [2021-12-06 17:39:27,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1504 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1327, Invalid=5645, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 17:39:27,963 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 568 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:27,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 1401 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1536 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:39:27,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2021-12-06 17:39:27,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 2096. [2021-12-06 17:39:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2093 states have (on average 1.1103678929765886) internal successors, (2324), 2095 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:39:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 2324 transitions. [2021-12-06 17:39:27,981 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 2324 transitions. Word has length 80 [2021-12-06 17:39:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:27,981 INFO L470 AbstractCegarLoop]: Abstraction has 2096 states and 2324 transitions. [2021-12-06 17:39:27,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 3.5272727272727273) internal successors, (194), 56 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:39:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 2324 transitions. [2021-12-06 17:39:27,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 17:39:27,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:27,983 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 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 17:39:28,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-06 17:39:28,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:39:28,184 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:39:28,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:28,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1959688598, now seen corresponding path program 8 times [2021-12-06 17:39:28,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:39:28,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995267344] [2021-12-06 17:39:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:28,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:39:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:39:28,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:39:28,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995267344] [2021-12-06 17:39:28,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995267344] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:28,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380876507] [2021-12-06 17:39:28,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:39:28,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:39:28,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:39:28,502 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:39:28,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-06 17:39:28,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:39:28,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:39:28,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 17:39:28,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:28,634 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:39:28,634 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 17:39:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 66 proven. 154 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:39:29,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 117 proven. 103 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:39:30,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380876507] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:39:30,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:39:30,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 68 [2021-12-06 17:39:30,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682070465] [2021-12-06 17:39:30,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:30,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-06 17:39:30,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:39:30,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-06 17:39:30,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=4233, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 17:39:30,381 INFO L87 Difference]: Start difference. First operand 2096 states and 2324 transitions. Second operand has 69 states, 68 states have (on average 3.338235294117647) internal successors, (227), 69 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:39:35,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:35,965 INFO L93 Difference]: Finished difference Result 3781 states and 4041 transitions. [2021-12-06 17:39:35,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-06 17:39:35,965 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 3.338235294117647) internal successors, (227), 69 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 17:39:35,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:35,969 INFO L225 Difference]: With dead ends: 3781 [2021-12-06 17:39:35,969 INFO L226 Difference]: Without dead ends: 3605 [2021-12-06 17:39:35,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3530 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4092, Invalid=17078, Unknown=0, NotChecked=0, Total=21170 [2021-12-06 17:39:35,970 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 960 mSDsluCounter, 1796 mSDsCounter, 0 mSdLazyCounter, 4297 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 1887 SdHoareTripleChecker+Invalid, 4517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 4297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:35,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [960 Valid, 1887 Invalid, 4517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 4297 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 17:39:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2021-12-06 17:39:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 1910. [2021-12-06 17:39:35,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1907 states have (on average 1.1027792343995806) internal successors, (2103), 1909 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:39:35,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2103 transitions. [2021-12-06 17:39:35,987 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2103 transitions. Word has length 81 [2021-12-06 17:39:35,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:35,987 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 2103 transitions. [2021-12-06 17:39:35,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 3.338235294117647) internal successors, (227), 69 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:39:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2103 transitions. [2021-12-06 17:39:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 17:39:35,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:35,988 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:36,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-06 17:39:36,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-12-06 17:39:36,190 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:39:36,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:36,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1140052959, now seen corresponding path program 17 times [2021-12-06 17:39:36,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:39:36,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818947248] [2021-12-06 17:39:36,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:36,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:39:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 120 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:39:36,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:39:36,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818947248] [2021-12-06 17:39:36,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818947248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:36,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559769457] [2021-12-06 17:39:36,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:39:36,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:39:36,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:39:36,543 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:39:36,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-06 17:39:36,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 17:39:36,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:39:36,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 17:39:36,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:36,708 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:39:36,709 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 17:39:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 153 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:39:37,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:39:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 190 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:39:38,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559769457] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:39:38,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:39:38,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 69 [2021-12-06 17:39:38,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691057749] [2021-12-06 17:39:38,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:39:38,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 17:39:38,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:39:38,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 17:39:38,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=4195, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 17:39:38,328 INFO L87 Difference]: Start difference. First operand 1910 states and 2103 transitions. Second operand has 70 states, 69 states have (on average 3.347826086956522) internal successors, (231), 70 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:39:41,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:39:41,272 INFO L93 Difference]: Finished difference Result 4446 states and 4715 transitions. [2021-12-06 17:39:41,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 17:39:41,272 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.347826086956522) internal successors, (231), 70 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-06 17:39:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:39:41,275 INFO L225 Difference]: With dead ends: 4446 [2021-12-06 17:39:41,275 INFO L226 Difference]: Without dead ends: 4446 [2021-12-06 17:39:41,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3164 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3444, Invalid=11808, Unknown=0, NotChecked=0, Total=15252 [2021-12-06 17:39:41,276 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 782 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 3252 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 3459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 3252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:39:41,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 1445 Invalid, 3459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 3252 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 17:39:41,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-12-06 17:39:41,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 1940. [2021-12-06 17:39:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1937 states have (on average 1.1053175012906558) internal successors, (2141), 1939 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:39:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 2141 transitions. [2021-12-06 17:39:41,299 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 2141 transitions. Word has length 83 [2021-12-06 17:39:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:39:41,299 INFO L470 AbstractCegarLoop]: Abstraction has 1940 states and 2141 transitions. [2021-12-06 17:39:41,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.347826086956522) internal successors, (231), 70 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:39:41,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 2141 transitions. [2021-12-06 17:39:41,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 17:39:41,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:39:41,301 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:39:41,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-12-06 17:39:41,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:39:41,502 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:39:41,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:39:41,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1488106348, now seen corresponding path program 16 times [2021-12-06 17:39:41,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:39:41,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878329872] [2021-12-06 17:39:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:39:41,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:39:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:39:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 18 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:39:42,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:39:42,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878329872] [2021-12-06 17:39:42,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878329872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:39:42,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411956120] [2021-12-06 17:39:42,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:39:42,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:39:42,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:39:42,278 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:39:42,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-06 17:39:42,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:39:42,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:39:42,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 130 conjunts are in the unsatisfiable core [2021-12-06 17:39:42,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:39:42,441 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:39:42,441 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 17:39:42,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:39:42,992 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 17:39:43,051 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 17:39:43,290 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 17:39:45,510 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 17:39:48,864 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 17:39:58,737 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 17:40:10,357 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 17:40:14,573 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 17:40:19,814 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 17:40:24,055 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 17:40:24,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:40:24,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-12-06 17:40:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 89 proven. 173 refuted. 20 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:40:24,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:41:07,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:41:07,532 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 17:41:07,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:41:07,537 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 17:41:07,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:41:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 67 proven. 165 refuted. 50 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:08,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411956120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:41:08,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:41:08,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 32, 32] total 99 [2021-12-06 17:41:08,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611968716] [2021-12-06 17:41:08,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:41:08,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-06 17:41:08,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:08,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-06 17:41:08,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=8940, Unknown=146, NotChecked=0, Total=9702 [2021-12-06 17:41:08,814 INFO L87 Difference]: Start difference. First operand 1940 states and 2141 transitions. Second operand has 99 states, 99 states have (on average 2.3636363636363638) internal successors, (234), 99 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 17:41:39,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:39,925 INFO L93 Difference]: Finished difference Result 2189 states and 2410 transitions. [2021-12-06 17:41:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 17:41:39,925 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.3636363636363638) internal successors, (234), 99 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 84 [2021-12-06 17:41:39,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:39,926 INFO L225 Difference]: With dead ends: 2189 [2021-12-06 17:41:39,927 INFO L226 Difference]: Without dead ends: 2074 [2021-12-06 17:41:39,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5054 ImplicationChecksByTransitivity, 115.5s TimeCoverageRelationStatistics Valid=1800, Invalid=22228, Unknown=152, NotChecked=0, Total=24180 [2021-12-06 17:41:39,928 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 470 mSDsluCounter, 3207 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 3281 SdHoareTripleChecker+Invalid, 2248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 512 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:39,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 3281 Invalid, 2248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1717 Invalid, 0 Unknown, 512 Unchecked, 0.6s Time] [2021-12-06 17:41:39,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-12-06 17:41:39,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2040. [2021-12-06 17:41:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2040 states, 2037 states have (on average 1.1055473735886108) internal successors, (2252), 2039 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 2252 transitions. [2021-12-06 17:41:39,939 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 2252 transitions. Word has length 84 [2021-12-06 17:41:39,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:39,939 INFO L470 AbstractCegarLoop]: Abstraction has 2040 states and 2252 transitions. [2021-12-06 17:41:39,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.3636363636363638) internal successors, (234), 99 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 17:41:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 2252 transitions. [2021-12-06 17:41:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 17:41:39,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:39,941 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:41:39,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-06 17:41:40,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-12-06 17:41:40,142 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:41:40,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:40,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1032782474, now seen corresponding path program 9 times [2021-12-06 17:41:40,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:40,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635402602] [2021-12-06 17:41:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:40,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:40,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:41:40,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635402602] [2021-12-06 17:41:40,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635402602] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:41:40,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068969076] [2021-12-06 17:41:40,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:41:40,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:41:40,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:41:40,434 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:41:40,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-06 17:41:40,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 17:41:40,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:41:40,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-06 17:41:40,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:41:40,801 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:41:40,801 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 17:41:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 43 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:41,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:41:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:42,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068969076] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:41:42,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:41:42,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 69 [2021-12-06 17:41:42,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786180117] [2021-12-06 17:41:42,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:41:42,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 17:41:42,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:42,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 17:41:42,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=4283, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 17:41:42,532 INFO L87 Difference]: Start difference. First operand 2040 states and 2252 transitions. Second operand has 70 states, 69 states have (on average 3.550724637681159) internal successors, (245), 70 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 17:41:48,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:48,860 INFO L93 Difference]: Finished difference Result 3201 states and 3427 transitions. [2021-12-06 17:41:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-06 17:41:48,860 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.550724637681159) internal successors, (245), 70 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 85 [2021-12-06 17:41:48,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:48,862 INFO L225 Difference]: With dead ends: 3201 [2021-12-06 17:41:48,862 INFO L226 Difference]: Without dead ends: 3070 [2021-12-06 17:41:48,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5851 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=6187, Invalid=21203, Unknown=0, NotChecked=0, Total=27390 [2021-12-06 17:41:48,863 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1568 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:48,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1568 Valid, 976 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 17:41:48,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-12-06 17:41:48,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2079. [2021-12-06 17:41:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2076 states have (on average 1.1040462427745665) internal successors, (2292), 2078 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 2292 transitions. [2021-12-06 17:41:48,878 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 2292 transitions. Word has length 85 [2021-12-06 17:41:48,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:48,879 INFO L470 AbstractCegarLoop]: Abstraction has 2079 states and 2292 transitions. [2021-12-06 17:41:48,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.550724637681159) internal successors, (245), 70 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 17:41:48,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 2292 transitions. [2021-12-06 17:41:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 17:41:48,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:48,880 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:41:48,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-12-06 17:41:49,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-12-06 17:41:49,081 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:41:49,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:49,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1422907561, now seen corresponding path program 17 times [2021-12-06 17:41:49,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:49,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144508532] [2021-12-06 17:41:49,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:49,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 91 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:49,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:41:49,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144508532] [2021-12-06 17:41:49,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144508532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:41:49,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923177461] [2021-12-06 17:41:49,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:41:49,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:41:49,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:41:49,398 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:41:49,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-06 17:41:50,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 17:41:50,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:41:50,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-06 17:41:50,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:41:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 120 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:50,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:41:50,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:41:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 120 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:51,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923177461] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:41:51,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:41:51,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 58 [2021-12-06 17:41:51,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439042188] [2021-12-06 17:41:51,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:41:51,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 17:41:51,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:51,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 17:41:51,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2988, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 17:41:51,318 INFO L87 Difference]: Start difference. First operand 2079 states and 2292 transitions. Second operand has 59 states, 58 states have (on average 3.7586206896551726) internal successors, (218), 59 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 17:41:52,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:41:52,603 INFO L93 Difference]: Finished difference Result 2807 states and 3065 transitions. [2021-12-06 17:41:52,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 17:41:52,603 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 3.7586206896551726) internal successors, (218), 59 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-06 17:41:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:41:52,605 INFO L225 Difference]: With dead ends: 2807 [2021-12-06 17:41:52,605 INFO L226 Difference]: Without dead ends: 2807 [2021-12-06 17:41:52,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1672, Invalid=6338, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 17:41:52,606 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 723 mSDsluCounter, 1695 mSDsCounter, 0 mSdLazyCounter, 2013 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 1793 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:41:52,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 1793 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2013 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 17:41:52,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2021-12-06 17:41:52,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 2246. [2021-12-06 17:41:52,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2246 states, 2243 states have (on average 1.1168078466339724) internal successors, (2505), 2245 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:41:52,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 2505 transitions. [2021-12-06 17:41:52,625 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 2505 transitions. Word has length 88 [2021-12-06 17:41:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:41:52,625 INFO L470 AbstractCegarLoop]: Abstraction has 2246 states and 2505 transitions. [2021-12-06 17:41:52,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 3.7586206896551726) internal successors, (218), 59 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 17:41:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 2505 transitions. [2021-12-06 17:41:52,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 17:41:52,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:41:52,627 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:41:52,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-12-06 17:41:52,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:41:52,828 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:41:52,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:41:52,829 INFO L85 PathProgramCache]: Analyzing trace with hash 99207859, now seen corresponding path program 10 times [2021-12-06 17:41:52,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:41:52,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704209515] [2021-12-06 17:41:52,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:41:52,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:41:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:41:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 66 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:41:53,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:41:53,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704209515] [2021-12-06 17:41:53,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704209515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:41:53,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556796671] [2021-12-06 17:41:53,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:41:53,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:41:53,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:41:53,166 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:41:53,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-06 17:41:53,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:41:53,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:41:53,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 151 conjunts are in the unsatisfiable core [2021-12-06 17:41:53,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:41:53,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:41:53,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:41:53,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-06 17:41:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-06 17:41:54,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:41:55,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:41:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-06 17:41:55,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556796671] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:41:55,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:41:55,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 17] total 55 [2021-12-06 17:41:55,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810609363] [2021-12-06 17:41:55,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:41:55,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 17:41:55,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:41:55,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 17:41:55,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2788, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 17:41:55,084 INFO L87 Difference]: Start difference. First operand 2246 states and 2505 transitions. Second operand has 56 states, 55 states have (on average 3.618181818181818) internal successors, (199), 56 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:10,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:42:10,912 INFO L93 Difference]: Finished difference Result 3003 states and 3267 transitions. [2021-12-06 17:42:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2021-12-06 17:42:10,912 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 3.618181818181818) internal successors, (199), 56 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-06 17:42:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:42:10,914 INFO L225 Difference]: With dead ends: 3003 [2021-12-06 17:42:10,914 INFO L226 Difference]: Without dead ends: 3003 [2021-12-06 17:42:10,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16619 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=8450, Invalid=48432, Unknown=0, NotChecked=0, Total=56882 [2021-12-06 17:42:10,920 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 1763 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 3731 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1763 SdHoareTripleChecker+Valid, 1697 SdHoareTripleChecker+Invalid, 4338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 3731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:42:10,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1763 Valid, 1697 Invalid, 4338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 3731 Invalid, 0 Unknown, 108 Unchecked, 1.7s Time] [2021-12-06 17:42:10,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2021-12-06 17:42:10,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2334. [2021-12-06 17:42:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2331 states have (on average 1.1175461175461177) internal successors, (2605), 2333 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 2605 transitions. [2021-12-06 17:42:10,936 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 2605 transitions. Word has length 88 [2021-12-06 17:42:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:10,936 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 2605 transitions. [2021-12-06 17:42:10,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 3.618181818181818) internal successors, (199), 56 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:10,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 2605 transitions. [2021-12-06 17:42:10,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 17:42:10,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:10,938 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:10,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-12-06 17:42:11,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:42:11,139 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:42:11,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:11,141 INFO L85 PathProgramCache]: Analyzing trace with hash 955090943, now seen corresponding path program 18 times [2021-12-06 17:42:11,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:42:11,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128271178] [2021-12-06 17:42:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:11,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:42:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 53 proven. 345 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:42:11,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:42:11,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128271178] [2021-12-06 17:42:11,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128271178] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:42:11,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358573478] [2021-12-06 17:42:11,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:42:11,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:42:11,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:42:11,463 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:42:11,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-06 17:42:11,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-06 17:42:11,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:42:11,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-06 17:42:11,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:42:11,936 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 17:42:12,070 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 17:42:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 53 proven. 345 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:42:12,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:42:12,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 17:42:12,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 17:42:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 53 proven. 345 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:42:12,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358573478] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:42:12,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:42:12,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 48 [2021-12-06 17:42:12,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086186611] [2021-12-06 17:42:12,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:42:12,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 17:42:12,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:42:12,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 17:42:12,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2114, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 17:42:12,301 INFO L87 Difference]: Start difference. First operand 2334 states and 2605 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 17:42:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:42:14,229 INFO L93 Difference]: Finished difference Result 6375 states and 6841 transitions. [2021-12-06 17:42:14,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 17:42:14,230 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 89 [2021-12-06 17:42:14,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:42:14,233 INFO L225 Difference]: With dead ends: 6375 [2021-12-06 17:42:14,233 INFO L226 Difference]: Without dead ends: 6340 [2021-12-06 17:42:14,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=444, Invalid=4812, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 17:42:14,233 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 622 mSDsluCounter, 4057 mSDsCounter, 0 mSdLazyCounter, 4325 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 4214 SdHoareTripleChecker+Invalid, 4650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 4325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:42:14,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 4214 Invalid, 4650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 4325 Invalid, 0 Unknown, 153 Unchecked, 1.3s Time] [2021-12-06 17:42:14,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6340 states. [2021-12-06 17:42:14,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6340 to 2689. [2021-12-06 17:42:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2689 states, 2686 states have (on average 1.120253164556962) internal successors, (3009), 2688 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2689 states to 2689 states and 3009 transitions. [2021-12-06 17:42:14,262 INFO L78 Accepts]: Start accepts. Automaton has 2689 states and 3009 transitions. Word has length 89 [2021-12-06 17:42:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:14,262 INFO L470 AbstractCegarLoop]: Abstraction has 2689 states and 3009 transitions. [2021-12-06 17:42:14,262 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 17:42:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2689 states and 3009 transitions. [2021-12-06 17:42:14,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 17:42:14,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:14,264 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:14,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-12-06 17:42:14,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:42:14,465 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:42:14,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:14,466 INFO L85 PathProgramCache]: Analyzing trace with hash 784415934, now seen corresponding path program 11 times [2021-12-06 17:42:14,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:42:14,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396644292] [2021-12-06 17:42:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:14,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:42:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 46 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:14,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:42:14,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396644292] [2021-12-06 17:42:14,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396644292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:42:14,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102002962] [2021-12-06 17:42:14,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:42:14,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:42:14,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:42:14,792 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:42:14,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-06 17:42:15,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-06 17:42:15,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:42:15,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-06 17:42:15,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:42:15,114 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:42:15,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:42:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 72 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:15,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:42:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 106 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:16,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102002962] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:42:16,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:42:16,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 74 [2021-12-06 17:42:16,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879507133] [2021-12-06 17:42:16,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:42:16,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-06 17:42:16,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:42:16,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-06 17:42:16,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=5004, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 17:42:16,944 INFO L87 Difference]: Start difference. First operand 2689 states and 3009 transitions. Second operand has 75 states, 74 states have (on average 3.5) internal successors, (259), 75 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:24,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:42:24,713 INFO L93 Difference]: Finished difference Result 4596 states and 4977 transitions. [2021-12-06 17:42:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-12-06 17:42:24,713 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 3.5) internal successors, (259), 75 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-12-06 17:42:24,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:42:24,716 INFO L225 Difference]: With dead ends: 4596 [2021-12-06 17:42:24,716 INFO L226 Difference]: Without dead ends: 4408 [2021-12-06 17:42:24,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7525 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=6941, Invalid=24921, Unknown=0, NotChecked=0, Total=31862 [2021-12-06 17:42:24,717 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1644 mSDsluCounter, 1673 mSDsCounter, 0 mSdLazyCounter, 4332 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 4751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 4332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:42:24,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1644 Valid, 1756 Invalid, 4751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 4332 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 17:42:24,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2021-12-06 17:42:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 2579. [2021-12-06 17:42:24,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2579 states, 2576 states have (on average 1.111024844720497) internal successors, (2862), 2578 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2579 states to 2579 states and 2862 transitions. [2021-12-06 17:42:24,736 INFO L78 Accepts]: Start accepts. Automaton has 2579 states and 2862 transitions. Word has length 90 [2021-12-06 17:42:24,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:24,736 INFO L470 AbstractCegarLoop]: Abstraction has 2579 states and 2862 transitions. [2021-12-06 17:42:24,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 3.5) internal successors, (259), 75 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:24,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2579 states and 2862 transitions. [2021-12-06 17:42:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 17:42:24,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:24,743 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:24,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-12-06 17:42:24,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-12-06 17:42:24,944 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:42:24,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:24,945 INFO L85 PathProgramCache]: Analyzing trace with hash 563865204, now seen corresponding path program 5 times [2021-12-06 17:42:24,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:42:24,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096055076] [2021-12-06 17:42:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:24,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:42:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 18 proven. 264 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:42:25,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:42:25,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096055076] [2021-12-06 17:42:25,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096055076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:42:25,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647399939] [2021-12-06 17:42:25,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:42:25,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:42:25,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:42:25,820 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:42:25,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-06 17:42:26,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 17:42:26,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:42:26,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 157 conjunts are in the unsatisfiable core [2021-12-06 17:42:26,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:42:26,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:42:27,238 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 17:42:27,290 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 17:42:27,441 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 17:42:27,509 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 17:42:27,561 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 17:42:27,615 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 17:42:27,669 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 17:42:27,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 17:42:27,780 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 17:42:27,794 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 17:42:27,800 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 17:42:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 18 proven. 264 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:42:27,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:42:27,815 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3321 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3321) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-06 17:42:27,820 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3321 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3321) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:42:27,826 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3320 (Array Int Int)) (v_ArrVal_3321 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3320) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3321) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:42:27,832 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3321 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3321) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:27,837 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3321 (Array Int Int)) (v_ArrVal_3319 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3319) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3321) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:27,842 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3321 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3321) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:27,848 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3321 (Array Int Int)) (v_ArrVal_3318 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3318) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3321) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:27,853 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3321 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3321) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 4)) 0)) is different from false [2021-12-06 17:42:27,859 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3321 (Array Int Int)) (v_ArrVal_3317 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3317) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3321) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 4)) 0)) is different from false [2021-12-06 17:42:27,864 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3321 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3321) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:27,870 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3321 (Array Int Int)) (v_ArrVal_3316 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3316) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3321) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:27,876 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3321 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3321) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:27,881 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3321 (Array Int Int)) (v_ArrVal_3315 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3315) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3321) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:27,887 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3321 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3321) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 7 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:27,893 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3321 (Array Int Int)) (v_ArrVal_3314 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3314) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3321) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 7 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:27,899 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3321 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3321) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 8)) 0)) is different from false [2021-12-06 17:42:27,910 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3321 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3321) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0)) is different from false [2021-12-06 17:42:27,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:42:27,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 17:42:27,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:42:27,920 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 17:42:27,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:42:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 18 proven. 121 refuted. 0 times theorem prover too weak. 3 trivial. 143 not checked. [2021-12-06 17:42:28,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647399939] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:42:28,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:42:28,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 33, 33] total 80 [2021-12-06 17:42:28,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155552261] [2021-12-06 17:42:28,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:42:28,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-06 17:42:28,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:42:28,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-06 17:42:28,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=3735, Unknown=17, NotChecked=2346, Total=6320 [2021-12-06 17:42:28,195 INFO L87 Difference]: Start difference. First operand 2579 states and 2862 transitions. Second operand has 80 states, 80 states have (on average 2.5375) internal successors, (203), 80 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:30,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:42:30,846 INFO L93 Difference]: Finished difference Result 2848 states and 3127 transitions. [2021-12-06 17:42:30,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 17:42:30,846 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.5375) internal successors, (203), 80 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-06 17:42:30,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:42:30,848 INFO L225 Difference]: With dead ends: 2848 [2021-12-06 17:42:30,848 INFO L226 Difference]: Without dead ends: 2721 [2021-12-06 17:42:30,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 142 SyntacticMatches, 22 SemanticMatches, 99 ConstructedPredicates, 17 IntricatePredicates, 1 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=353, Invalid=6669, Unknown=18, NotChecked=3060, Total=10100 [2021-12-06 17:42:30,848 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 232 mSDsluCounter, 3407 mSDsCounter, 0 mSdLazyCounter, 3941 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 3508 SdHoareTripleChecker+Invalid, 7663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3687 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:42:30,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 3508 Invalid, 7663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3941 Invalid, 0 Unknown, 3687 Unchecked, 1.3s Time] [2021-12-06 17:42:30,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-12-06 17:42:30,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2556. [2021-12-06 17:42:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2553 states have (on average 1.1026243634939288) internal successors, (2815), 2555 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:30,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 2815 transitions. [2021-12-06 17:42:30,863 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 2815 transitions. Word has length 91 [2021-12-06 17:42:30,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:30,863 INFO L470 AbstractCegarLoop]: Abstraction has 2556 states and 2815 transitions. [2021-12-06 17:42:30,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.5375) internal successors, (203), 80 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:30,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 2815 transitions. [2021-12-06 17:42:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 17:42:30,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:30,866 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:30,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-12-06 17:42:31,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:42:31,067 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:42:31,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:31,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1113764513, now seen corresponding path program 18 times [2021-12-06 17:42:31,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:42:31,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929951720] [2021-12-06 17:42:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:31,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:42:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 20 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:32,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:42:32,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929951720] [2021-12-06 17:42:32,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929951720] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:42:32,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457552755] [2021-12-06 17:42:32,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:42:32,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:42:32,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:42:32,022 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:42:32,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-06 17:42:33,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-06 17:42:33,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:42:33,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 220 conjunts are in the unsatisfiable core [2021-12-06 17:42:33,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:42:33,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:42:33,645 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 17:42:33,704 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 17:42:33,861 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 17:42:33,999 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 17:42:34,144 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 17:42:34,277 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 17:42:34,424 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 17:42:34,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:42:34,719 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 17:42:34,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 17:42:35,020 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 17:42:35,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:42:35,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:42:35,147 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 17 treesize of output 10 [2021-12-06 17:42:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 20 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:35,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:42:35,164 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3429 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-06 17:42:35,169 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3429 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:42:35,174 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3428 (Array Int Int)) (v_ArrVal_3429 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3428) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:42:35,179 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3429 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:35,184 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3427 (Array Int Int)) (v_ArrVal_3429 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3427) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:35,190 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3429 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:35,195 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3426 (Array Int Int)) (v_ArrVal_3429 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3426) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:35,200 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3429 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 4)) 0)) is different from false [2021-12-06 17:42:35,205 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3425 (Array Int Int)) (v_ArrVal_3429 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3425) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 4)) 0)) is different from false [2021-12-06 17:42:35,213 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3429 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:35,218 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3424 (Array Int Int)) (v_ArrVal_3429 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3424) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:35,223 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3429 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:35,229 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3423 (Array Int Int)) (v_ArrVal_3429 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3423) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:35,234 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3429 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 7 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:35,239 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3422 (Array Int Int)) (v_ArrVal_3429 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3422) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 7 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:35,245 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3429 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 8)) 0)) is different from false [2021-12-06 17:42:35,250 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3421 (Array Int Int)) (v_ArrVal_3429 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3421) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 8)) 0)) is different from false [2021-12-06 17:42:35,256 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3429 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_3429) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 9 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:42:35,262 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3429 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3429) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) 0)) is different from false [2021-12-06 17:42:35,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:42:35,268 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 17:42:35,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:42:35,271 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 17:42:35,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:42:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 179 not checked. [2021-12-06 17:42:35,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457552755] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:42:35,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:42:35,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 36, 36] total 109 [2021-12-06 17:42:35,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160090346] [2021-12-06 17:42:35,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:42:35,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-06 17:42:35,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:42:35,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-06 17:42:35,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=7735, Unknown=19, NotChecked=3686, Total=11772 [2021-12-06 17:42:35,875 INFO L87 Difference]: Start difference. First operand 2556 states and 2815 transitions. Second operand has 109 states, 109 states have (on average 2.3394495412844036) internal successors, (255), 109 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:42:38,337 INFO L93 Difference]: Finished difference Result 2729 states and 3012 transitions. [2021-12-06 17:42:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 17:42:38,337 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.3394495412844036) internal successors, (255), 109 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have 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 17:42:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:42:38,339 INFO L225 Difference]: With dead ends: 2729 [2021-12-06 17:42:38,339 INFO L226 Difference]: Without dead ends: 2682 [2021-12-06 17:42:38,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 121 SyntacticMatches, 9 SemanticMatches, 136 ConstructedPredicates, 19 IntricatePredicates, 10 DeprecatedPredicates, 4200 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=538, Invalid=13561, Unknown=19, NotChecked=4788, Total=18906 [2021-12-06 17:42:38,341 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 175 mSDsluCounter, 3800 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 3881 SdHoareTripleChecker+Invalid, 5213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3017 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:42:38,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 3881 Invalid, 5213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2185 Invalid, 0 Unknown, 3017 Unchecked, 0.6s Time] [2021-12-06 17:42:38,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-12-06 17:42:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 2665. [2021-12-06 17:42:38,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2665 states, 2662 states have (on average 1.1029301277235162) internal successors, (2936), 2664 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:38,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 2936 transitions. [2021-12-06 17:42:38,366 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 2936 transitions. Word has length 92 [2021-12-06 17:42:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:38,367 INFO L470 AbstractCegarLoop]: Abstraction has 2665 states and 2936 transitions. [2021-12-06 17:42:38,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.3394495412844036) internal successors, (255), 109 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:38,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 2936 transitions. [2021-12-06 17:42:38,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 17:42:38,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:38,370 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:38,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-12-06 17:42:38,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:42:38,571 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:42:38,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:38,572 INFO L85 PathProgramCache]: Analyzing trace with hash -532225060, now seen corresponding path program 19 times [2021-12-06 17:42:38,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:42:38,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615770720] [2021-12-06 17:42:38,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:38,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:42:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 153 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:38,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:42:38,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615770720] [2021-12-06 17:42:38,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615770720] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:42:38,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10614431] [2021-12-06 17:42:38,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:42:38,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:42:38,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:42:38,953 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:42:38,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-06 17:42:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:39,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 17:42:39,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:42:39,101 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:42:39,101 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 17:42:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 190 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:39,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:42:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:41,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10614431] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:42:41,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:42:41,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 81 [2021-12-06 17:42:41,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2387478] [2021-12-06 17:42:41,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:42:41,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-06 17:42:41,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:42:41,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-06 17:42:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=5941, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 17:42:41,225 INFO L87 Difference]: Start difference. First operand 2665 states and 2936 transitions. Second operand has 82 states, 81 states have (on average 3.308641975308642) internal successors, (268), 82 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:44,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:42:44,707 INFO L93 Difference]: Finished difference Result 6446 states and 6887 transitions. [2021-12-06 17:42:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 17:42:44,707 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.308641975308642) internal successors, (268), 82 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-06 17:42:44,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:42:44,711 INFO L225 Difference]: With dead ends: 6446 [2021-12-06 17:42:44,711 INFO L226 Difference]: Without dead ends: 6446 [2021-12-06 17:42:44,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3652 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3129, Invalid=13901, Unknown=0, NotChecked=0, Total=17030 [2021-12-06 17:42:44,712 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 757 mSDsluCounter, 1994 mSDsCounter, 0 mSdLazyCounter, 4496 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 2077 SdHoareTripleChecker+Invalid, 4654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 4496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:42:44,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 2077 Invalid, 4654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 4496 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 17:42:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6446 states. [2021-12-06 17:42:44,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6446 to 2695. [2021-12-06 17:42:44,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 2692 states have (on average 1.1051263001485885) internal successors, (2975), 2694 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:44,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 2975 transitions. [2021-12-06 17:42:44,740 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 2975 transitions. Word has length 93 [2021-12-06 17:42:44,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:44,740 INFO L470 AbstractCegarLoop]: Abstraction has 2695 states and 2975 transitions. [2021-12-06 17:42:44,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.308641975308642) internal successors, (268), 82 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:44,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 2975 transitions. [2021-12-06 17:42:44,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-06 17:42:44,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:44,742 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:42:44,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-12-06 17:42:44,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-12-06 17:42:44,943 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:42:44,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:44,944 INFO L85 PathProgramCache]: Analyzing trace with hash -528184098, now seen corresponding path program 12 times [2021-12-06 17:42:44,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:42:44,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832906357] [2021-12-06 17:42:44,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:44,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:42:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 46 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:45,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:42:45,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832906357] [2021-12-06 17:42:45,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832906357] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:42:45,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271441430] [2021-12-06 17:42:45,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:42:45,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:42:45,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:42:45,277 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:42:45,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-06 17:42:46,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 17:42:46,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:42:46,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-06 17:42:46,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:42:46,107 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:42:46,107 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 17:42:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 72 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:46,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:42:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 106 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:48,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271441430] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:42:48,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:42:48,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 75 [2021-12-06 17:42:48,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153387766] [2021-12-06 17:42:48,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:42:48,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-06 17:42:48,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:42:48,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-06 17:42:48,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=655, Invalid=5045, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 17:42:48,228 INFO L87 Difference]: Start difference. First operand 2695 states and 2975 transitions. Second operand has 76 states, 75 states have (on average 3.6266666666666665) internal successors, (272), 76 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:56,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:42:56,091 INFO L93 Difference]: Finished difference Result 3774 states and 4085 transitions. [2021-12-06 17:42:56,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-12-06 17:42:56,092 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 3.6266666666666665) internal successors, (272), 76 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-12-06 17:42:56,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:42:56,094 INFO L225 Difference]: With dead ends: 3774 [2021-12-06 17:42:56,094 INFO L226 Difference]: Without dead ends: 3663 [2021-12-06 17:42:56,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7316 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=7797, Invalid=25875, Unknown=0, NotChecked=0, Total=33672 [2021-12-06 17:42:56,095 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1887 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1887 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 3101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:42:56,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1887 Valid, 1155 Invalid, 3101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 17:42:56,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3663 states. [2021-12-06 17:42:56,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3663 to 2713. [2021-12-06 17:42:56,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2710 states have (on average 1.1047970479704796) internal successors, (2994), 2712 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 2994 transitions. [2021-12-06 17:42:56,118 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 2994 transitions. Word has length 94 [2021-12-06 17:42:56,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:42:56,118 INFO L470 AbstractCegarLoop]: Abstraction has 2713 states and 2994 transitions. [2021-12-06 17:42:56,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 3.6266666666666665) internal successors, (272), 76 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:42:56,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 2994 transitions. [2021-12-06 17:42:56,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 17:42:56,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:42:56,120 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 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 17:42:56,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-12-06 17:42:56,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-12-06 17:42:56,321 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:42:56,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:42:56,322 INFO L85 PathProgramCache]: Analyzing trace with hash 266754180, now seen corresponding path program 13 times [2021-12-06 17:42:56,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:42:56,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127027499] [2021-12-06 17:42:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:42:56,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:42:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 120 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:56,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:42:56,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127027499] [2021-12-06 17:42:56,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127027499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:42:56,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773686434] [2021-12-06 17:42:56,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:42:56,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:42:56,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:42:56,709 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:42:56,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-06 17:42:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:42:56,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-06 17:42:56,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:42:56,858 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:42:56,858 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 17:42:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 153 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:57,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:42:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 191 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:42:58,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773686434] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:42:58,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:42:58,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 81 [2021-12-06 17:42:58,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613981454] [2021-12-06 17:42:58,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:42:58,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-06 17:42:58,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:42:58,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-06 17:42:58,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=5954, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 17:42:58,902 INFO L87 Difference]: Start difference. First operand 2713 states and 2994 transitions. Second operand has 82 states, 81 states have (on average 3.382716049382716) internal successors, (274), 82 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:05,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:05,935 INFO L93 Difference]: Finished difference Result 5832 states and 6222 transitions. [2021-12-06 17:43:05,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-06 17:43:05,935 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.382716049382716) internal successors, (274), 82 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-06 17:43:05,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:05,938 INFO L225 Difference]: With dead ends: 5832 [2021-12-06 17:43:05,938 INFO L226 Difference]: Without dead ends: 5666 [2021-12-06 17:43:05,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6522 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=6413, Invalid=23689, Unknown=0, NotChecked=0, Total=30102 [2021-12-06 17:43:05,939 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 832 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 5064 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 2038 SdHoareTripleChecker+Invalid, 5264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 5064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:05,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 2038 Invalid, 5264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 5064 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 17:43:05,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5666 states. [2021-12-06 17:43:05,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5666 to 2451. [2021-12-06 17:43:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 2448 states have (on average 1.098856209150327) internal successors, (2690), 2450 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:05,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 2690 transitions. [2021-12-06 17:43:05,961 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 2690 transitions. Word has length 95 [2021-12-06 17:43:05,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:05,961 INFO L470 AbstractCegarLoop]: Abstraction has 2451 states and 2690 transitions. [2021-12-06 17:43:05,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.382716049382716) internal successors, (274), 82 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:05,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 2690 transitions. [2021-12-06 17:43:05,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 17:43:05,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:05,963 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:05,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-12-06 17:43:06,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-12-06 17:43:06,165 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:43:06,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:06,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1502512301, now seen corresponding path program 20 times [2021-12-06 17:43:06,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:06,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411631305] [2021-12-06 17:43:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:06,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 58 proven. 418 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:43:06,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:06,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411631305] [2021-12-06 17:43:06,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411631305] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:06,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305484902] [2021-12-06 17:43:06,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:43:06,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:06,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:06,524 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:06,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-06 17:43:06,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:43:06,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:06,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-06 17:43:06,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:06,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 17:43:07,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:43:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 58 proven. 418 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:43:07,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:07,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 17:43:07,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 17:43:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 58 proven. 418 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:43:07,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305484902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:07,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:07,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 51 [2021-12-06 17:43:07,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653397661] [2021-12-06 17:43:07,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:07,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 17:43:07,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:07,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 17:43:07,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2400, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 17:43:07,318 INFO L87 Difference]: Start difference. First operand 2451 states and 2690 transitions. Second operand has 51 states, 51 states have (on average 3.1176470588235294) internal successors, (159), 51 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:09,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:09,293 INFO L93 Difference]: Finished difference Result 7169 states and 7628 transitions. [2021-12-06 17:43:09,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 17:43:09,294 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.1176470588235294) internal successors, (159), 51 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-06 17:43:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:09,297 INFO L225 Difference]: With dead ends: 7169 [2021-12-06 17:43:09,297 INFO L226 Difference]: Without dead ends: 7093 [2021-12-06 17:43:09,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=475, Invalid=5531, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 17:43:09,297 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 773 mSDsluCounter, 3928 mSDsCounter, 0 mSdLazyCounter, 4489 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 4099 SdHoareTripleChecker+Invalid, 4932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 4489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:09,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 4099 Invalid, 4932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 4489 Invalid, 0 Unknown, 288 Unchecked, 1.3s Time] [2021-12-06 17:43:09,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7093 states. [2021-12-06 17:43:09,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7093 to 2804. [2021-12-06 17:43:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2801 states have (on average 1.1010353445198144) internal successors, (3084), 2803 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 3084 transitions. [2021-12-06 17:43:09,325 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 3084 transitions. Word has length 96 [2021-12-06 17:43:09,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:09,325 INFO L470 AbstractCegarLoop]: Abstraction has 2804 states and 3084 transitions. [2021-12-06 17:43:09,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.1176470588235294) internal successors, (159), 51 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:09,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 3084 transitions. [2021-12-06 17:43:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 17:43:09,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:09,328 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:09,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-12-06 17:43:09,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-12-06 17:43:09,529 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:43:09,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:09,530 INFO L85 PathProgramCache]: Analyzing trace with hash -165235422, now seen corresponding path program 19 times [2021-12-06 17:43:09,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:09,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124896120] [2021-12-06 17:43:09,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:09,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 120 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:09,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:09,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124896120] [2021-12-06 17:43:09,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124896120] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:09,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048797102] [2021-12-06 17:43:09,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 17:43:09,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:09,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:09,890 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:09,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-06 17:43:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:10,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-06 17:43:10,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:10,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:10,056 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 17:43:10,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:43:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 153 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:10,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 190 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:12,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048797102] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:12,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:12,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 74 [2021-12-06 17:43:12,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181724139] [2021-12-06 17:43:12,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:12,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-06 17:43:12,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:12,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-06 17:43:12,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=5035, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 17:43:12,163 INFO L87 Difference]: Start difference. First operand 2804 states and 3084 transitions. Second operand has 75 states, 74 states have (on average 3.7567567567567566) internal successors, (278), 75 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:15,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:15,018 INFO L93 Difference]: Finished difference Result 3834 states and 4184 transitions. [2021-12-06 17:43:15,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 17:43:15,019 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 3.7567567567567566) internal successors, (278), 75 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have 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 17:43:15,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:15,020 INFO L225 Difference]: With dead ends: 3834 [2021-12-06 17:43:15,020 INFO L226 Difference]: Without dead ends: 3834 [2021-12-06 17:43:15,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2913, Invalid=13089, Unknown=0, NotChecked=0, Total=16002 [2021-12-06 17:43:15,021 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1137 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 2721 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 2791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:15,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1137 Valid, 1901 Invalid, 2791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2721 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 17:43:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2021-12-06 17:43:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3064. [2021-12-06 17:43:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 3061 states have (on average 1.1123815746488075) internal successors, (3405), 3063 states have internal predecessors, (3405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 3405 transitions. [2021-12-06 17:43:15,041 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 3405 transitions. Word has length 96 [2021-12-06 17:43:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:15,042 INFO L470 AbstractCegarLoop]: Abstraction has 3064 states and 3405 transitions. [2021-12-06 17:43:15,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 3.7567567567567566) internal successors, (278), 75 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 3405 transitions. [2021-12-06 17:43:15,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 17:43:15,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:15,044 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:15,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-12-06 17:43:15,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:15,245 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:43:15,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:15,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1914469799, now seen corresponding path program 6 times [2021-12-06 17:43:15,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:15,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110870551] [2021-12-06 17:43:15,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:15,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 20 proven. 333 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:43:16,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:16,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110870551] [2021-12-06 17:43:16,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110870551] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:16,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788064805] [2021-12-06 17:43:16,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:43:16,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:16,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:16,216 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:16,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-06 17:43:17,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-06 17:43:17,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:17,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 237 conjunts are in the unsatisfiable core [2021-12-06 17:43:17,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:17,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:43:18,304 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 17:43:18,368 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 17:43:18,598 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 17:43:18,732 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 17:43:18,890 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 17:43:19,040 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 17:43:19,191 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 17:43:19,335 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 17:43:19,483 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 17:43:19,633 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 17:43:19,799 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 17:43:19,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:43:19,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 17:43:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 20 proven. 335 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:20,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:20,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:20,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-12-06 17:43:22,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:22,134 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 17:43:22,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:22,139 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 17:43:22,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:43:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 2 proven. 353 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 17:43:23,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788064805] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:23,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:23,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 38, 39] total 119 [2021-12-06 17:43:23,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342863139] [2021-12-06 17:43:23,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:23,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-06 17:43:23,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:23,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-06 17:43:23,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=13492, Unknown=105, NotChecked=0, Total=14042 [2021-12-06 17:43:23,394 INFO L87 Difference]: Start difference. First operand 3064 states and 3405 transitions. Second operand has 119 states, 119 states have (on average 2.3865546218487395) internal successors, (284), 119 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:27,968 INFO L93 Difference]: Finished difference Result 3394 states and 3732 transitions. [2021-12-06 17:43:27,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-06 17:43:27,968 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.3865546218487395) internal successors, (284), 119 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have 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 17:43:27,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:27,970 INFO L225 Difference]: With dead ends: 3394 [2021-12-06 17:43:27,970 INFO L226 Difference]: Without dead ends: 3266 [2021-12-06 17:43:27,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8608 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=948, Invalid=30442, Unknown=116, NotChecked=0, Total=31506 [2021-12-06 17:43:27,972 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 350 mSDsluCounter, 4672 mSDsCounter, 0 mSdLazyCounter, 3051 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 4780 SdHoareTripleChecker+Invalid, 5692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2618 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:27,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 4780 Invalid, 5692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3051 Invalid, 0 Unknown, 2618 Unchecked, 1.1s Time] [2021-12-06 17:43:27,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3266 states. [2021-12-06 17:43:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3266 to 3047. [2021-12-06 17:43:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3047 states, 3044 states have (on average 1.1054533508541393) internal successors, (3365), 3046 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3047 states to 3047 states and 3365 transitions. [2021-12-06 17:43:27,994 INFO L78 Accepts]: Start accepts. Automaton has 3047 states and 3365 transitions. Word has length 99 [2021-12-06 17:43:27,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:27,994 INFO L470 AbstractCegarLoop]: Abstraction has 3047 states and 3365 transitions. [2021-12-06 17:43:27,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.3865546218487395) internal successors, (284), 119 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:27,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3047 states and 3365 transitions. [2021-12-06 17:43:27,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 17:43:27,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:27,997 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:28,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-12-06 17:43:28,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:28,198 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:43:28,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:28,199 INFO L85 PathProgramCache]: Analyzing trace with hash -466192476, now seen corresponding path program 14 times [2021-12-06 17:43:28,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:28,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733597004] [2021-12-06 17:43:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:28,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 43 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:28,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:28,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733597004] [2021-12-06 17:43:28,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733597004] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:28,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286834587] [2021-12-06 17:43:28,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:43:28,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:28,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:28,603 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:28,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-06 17:43:28,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:43:28,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:28,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-06 17:43:28,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:28,767 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:43:28,767 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 17:43:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 56 proven. 163 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:43:29,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 107 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 17:43:31,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286834587] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:31,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:31,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 79 [2021-12-06 17:43:31,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395264374] [2021-12-06 17:43:31,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:31,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-06 17:43:31,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:31,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-06 17:43:31,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=5766, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 17:43:31,206 INFO L87 Difference]: Start difference. First operand 3047 states and 3365 transitions. Second operand has 80 states, 79 states have (on average 3.5569620253164556) internal successors, (281), 80 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:39,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:39,410 INFO L93 Difference]: Finished difference Result 5211 states and 5600 transitions. [2021-12-06 17:43:39,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-06 17:43:39,410 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 3.5569620253164556) internal successors, (281), 80 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-06 17:43:39,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:39,412 INFO L225 Difference]: With dead ends: 5211 [2021-12-06 17:43:39,412 INFO L226 Difference]: Without dead ends: 5003 [2021-12-06 17:43:39,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5375 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=6169, Invalid=24631, Unknown=0, NotChecked=0, Total=30800 [2021-12-06 17:43:39,414 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 1511 mSDsluCounter, 2391 mSDsCounter, 0 mSdLazyCounter, 5501 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 2492 SdHoareTripleChecker+Invalid, 5826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 5501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:39,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 2492 Invalid, 5826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 5501 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 17:43:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5003 states. [2021-12-06 17:43:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5003 to 3101. [2021-12-06 17:43:39,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3098 states have (on average 1.1036152356358941) internal successors, (3419), 3100 states have internal predecessors, (3419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:39,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 3419 transitions. [2021-12-06 17:43:39,439 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 3419 transitions. Word has length 99 [2021-12-06 17:43:39,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:39,440 INFO L470 AbstractCegarLoop]: Abstraction has 3101 states and 3419 transitions. [2021-12-06 17:43:39,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 3.5569620253164556) internal successors, (281), 80 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 3419 transitions. [2021-12-06 17:43:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 17:43:39,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:39,442 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:39,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-12-06 17:43:39,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-12-06 17:43:39,643 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:43:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:39,644 INFO L85 PathProgramCache]: Analyzing trace with hash 611092016, now seen corresponding path program 21 times [2021-12-06 17:43:39,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:39,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487416915] [2021-12-06 17:43:39,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:39,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 190 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:40,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:40,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487416915] [2021-12-06 17:43:40,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487416915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:40,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286100575] [2021-12-06 17:43:40,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:43:40,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:40,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:40,113 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:40,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-06 17:43:40,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-06 17:43:40,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:40,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 17:43:40,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:40,435 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:43:40,435 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 17:43:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 231 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:41,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 276 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:42,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286100575] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:42,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:42,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 88 [2021-12-06 17:43:42,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323249865] [2021-12-06 17:43:42,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:42,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-06 17:43:42,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:42,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-06 17:43:42,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=6856, Unknown=0, NotChecked=0, Total=7832 [2021-12-06 17:43:42,878 INFO L87 Difference]: Start difference. First operand 3101 states and 3419 transitions. Second operand has 89 states, 88 states have (on average 3.2954545454545454) internal successors, (290), 89 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 17:43:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:46,435 INFO L93 Difference]: Finished difference Result 7904 states and 8401 transitions. [2021-12-06 17:43:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 17:43:46,435 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 3.2954545454545454) internal successors, (290), 89 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 100 [2021-12-06 17:43:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:46,439 INFO L225 Difference]: With dead ends: 7904 [2021-12-06 17:43:46,439 INFO L226 Difference]: Without dead ends: 7904 [2021-12-06 17:43:46,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4099 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3915, Invalid=16107, Unknown=0, NotChecked=0, Total=20022 [2021-12-06 17:43:46,440 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1109 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 3034 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1109 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 3034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:46,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1109 Valid, 1280 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 3034 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 17:43:46,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7904 states. [2021-12-06 17:43:46,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7904 to 3134. [2021-12-06 17:43:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3134 states, 3131 states have (on average 1.1057170233152347) internal successors, (3462), 3133 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3134 states to 3134 states and 3462 transitions. [2021-12-06 17:43:46,468 INFO L78 Accepts]: Start accepts. Automaton has 3134 states and 3462 transitions. Word has length 100 [2021-12-06 17:43:46,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:46,468 INFO L470 AbstractCegarLoop]: Abstraction has 3134 states and 3462 transitions. [2021-12-06 17:43:46,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 3.2954545454545454) internal successors, (290), 89 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 17:43:46,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3134 states and 3462 transitions. [2021-12-06 17:43:46,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 17:43:46,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:46,471 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:46,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-12-06 17:43:46,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:46,672 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:43:46,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:46,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1806826922, now seen corresponding path program 20 times [2021-12-06 17:43:46,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:46,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22540002] [2021-12-06 17:43:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:46,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 22 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:47,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:47,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22540002] [2021-12-06 17:43:47,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22540002] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:47,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528183656] [2021-12-06 17:43:47,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:43:47,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:47,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:47,777 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:47,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-06 17:43:47,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:43:47,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:47,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 185 conjunts are in the unsatisfiable core [2021-12-06 17:43:47,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:47,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:43:48,489 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 17:43:48,547 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 17:43:48,690 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 17:43:48,760 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 17:43:48,810 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 17:43:48,860 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 17:43:48,911 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 17:43:48,962 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 17:43:49,015 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 17:43:49,076 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 17:43:49,135 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 17:43:49,148 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 17:43:49,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:43:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 22 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:43:49,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:43:49,166 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4195 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-06 17:43:49,171 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4195 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:43:49,176 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4194 (Array Int Int)) (v_ArrVal_4195 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4194) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-06 17:43:49,181 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4195 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:43:49,186 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4193 (Array Int Int)) (v_ArrVal_4195 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4193) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:43:49,192 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4195 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:43:49,197 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4192 (Array Int Int)) (v_ArrVal_4195 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4192) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:43:49,202 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4195 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 4)) 0)) is different from false [2021-12-06 17:43:49,207 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4191 (Array Int Int)) (v_ArrVal_4195 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4191) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 4)) 0)) is different from false [2021-12-06 17:43:49,213 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4195 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:43:49,218 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4190 (Array Int Int)) (v_ArrVal_4195 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4190) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 5 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:43:49,223 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4195 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:43:49,229 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4189 (Array Int Int)) (v_ArrVal_4195 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4189) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 6 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:43:49,234 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4195 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 7 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:43:49,239 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4188 (Array Int Int)) (v_ArrVal_4195 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4188) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 7 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:43:49,245 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4195 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 8)) 0)) is different from false [2021-12-06 17:43:49,250 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4187 (Array Int Int)) (v_ArrVal_4195 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4187) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 8)) 0)) is different from false [2021-12-06 17:43:49,257 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4195 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 9 |c_ULTIMATE.start_cstrcat_~append#1.offset|)))) is different from false [2021-12-06 17:43:49,262 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4186 (Array Int Int)) (v_ArrVal_4195 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4186) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 9 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2021-12-06 17:43:49,268 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4195 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_4195) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 10)) 0)) is different from false [2021-12-06 17:43:49,276 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4195 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4195) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)) 0)) is different from false [2021-12-06 17:43:49,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:49,281 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 17:43:49,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:43:49,284 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 17:43:49,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:43:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 22 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 219 not checked. [2021-12-06 17:43:49,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528183656] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:43:49,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:43:49,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 39, 39] total 96 [2021-12-06 17:43:49,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233085263] [2021-12-06 17:43:49,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:43:49,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-06 17:43:49,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:43:49,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-06 17:43:49,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=5347, Unknown=21, NotChecked=3486, Total=9120 [2021-12-06 17:43:49,567 INFO L87 Difference]: Start difference. First operand 3134 states and 3462 transitions. Second operand has 96 states, 96 states have (on average 2.3645833333333335) internal successors, (227), 96 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:52,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:43:52,872 INFO L93 Difference]: Finished difference Result 3888 states and 4305 transitions. [2021-12-06 17:43:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 17:43:52,873 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.3645833333333335) internal successors, (227), 96 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-12-06 17:43:52,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:43:52,875 INFO L225 Difference]: With dead ends: 3888 [2021-12-06 17:43:52,875 INFO L226 Difference]: Without dead ends: 3741 [2021-12-06 17:43:52,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 151 SyntacticMatches, 24 SemanticMatches, 116 ConstructedPredicates, 21 IntricatePredicates, 0 DeprecatedPredicates, 2335 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=408, Invalid=8967, Unknown=21, NotChecked=4410, Total=13806 [2021-12-06 17:43:52,875 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 244 mSDsluCounter, 3750 mSDsCounter, 0 mSdLazyCounter, 4573 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 3839 SdHoareTripleChecker+Invalid, 8798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 4573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4191 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:43:52,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 3839 Invalid, 8798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 4573 Invalid, 0 Unknown, 4191 Unchecked, 1.5s Time] [2021-12-06 17:43:52,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2021-12-06 17:43:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 3506. [2021-12-06 17:43:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3503 states have (on average 1.1119040822152442) internal successors, (3895), 3505 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 3895 transitions. [2021-12-06 17:43:52,899 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 3895 transitions. Word has length 100 [2021-12-06 17:43:52,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:43:52,899 INFO L470 AbstractCegarLoop]: Abstraction has 3506 states and 3895 transitions. [2021-12-06 17:43:52,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.3645833333333335) internal successors, (227), 96 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:43:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 3895 transitions. [2021-12-06 17:43:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 17:43:52,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:43:52,901 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:43:52,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-12-06 17:43:53,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:53,102 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:43:53,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:43:53,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1324101159, now seen corresponding path program 22 times [2021-12-06 17:43:53,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:43:53,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286118919] [2021-12-06 17:43:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:43:53,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:43:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:43:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 63 proven. 498 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:43:53,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:43:53,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286118919] [2021-12-06 17:43:53,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286118919] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:43:53,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619071959] [2021-12-06 17:43:53,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:43:53,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:43:53,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:43:53,546 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:43:53,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-06 17:43:53,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:43:53,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:43:53,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-06 17:43:53,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:43:54,234 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 17:43:59,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:43:59,642 INFO L354 Elim1Store]: treesize reduction 81, result has 51.8 percent of original size [2021-12-06 17:43:59,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 78 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 138 treesize of output 141 [2021-12-06 17:44:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 63 proven. 498 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:44:01,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:06,463 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 194 treesize of output 168 [2021-12-06 17:44:06,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:06,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 78 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 320 treesize of output 270 [2021-12-06 17:44:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 285 proven. 276 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:44:11,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619071959] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:11,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:11,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 57, 57] total 138 [2021-12-06 17:44:11,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625866980] [2021-12-06 17:44:11,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:11,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2021-12-06 17:44:11,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:11,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-12-06 17:44:11,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1724, Invalid=17182, Unknown=0, NotChecked=0, Total=18906 [2021-12-06 17:44:11,052 INFO L87 Difference]: Start difference. First operand 3506 states and 3895 transitions. Second operand has 138 states, 138 states have (on average 2.0652173913043477) internal successors, (285), 138 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:17,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:17,826 INFO L93 Difference]: Finished difference Result 4234 states and 4701 transitions. [2021-12-06 17:44:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-12-06 17:44:17,827 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0652173913043477) internal successors, (285), 138 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-06 17:44:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:17,829 INFO L225 Difference]: With dead ends: 4234 [2021-12-06 17:44:17,829 INFO L226 Difference]: Without dead ends: 4193 [2021-12-06 17:44:17,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13972 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=3851, Invalid=42589, Unknown=0, NotChecked=0, Total=46440 [2021-12-06 17:44:17,831 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 407 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 661 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:17,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1138 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1818 Invalid, 0 Unknown, 661 Unchecked, 0.8s Time] [2021-12-06 17:44:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-12-06 17:44:17,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 4005. [2021-12-06 17:44:17,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4005 states, 4002 states have (on average 1.1149425287356323) internal successors, (4462), 4004 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4005 states to 4005 states and 4462 transitions. [2021-12-06 17:44:17,852 INFO L78 Accepts]: Start accepts. Automaton has 4005 states and 4462 transitions. Word has length 103 [2021-12-06 17:44:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:17,852 INFO L470 AbstractCegarLoop]: Abstraction has 4005 states and 4462 transitions. [2021-12-06 17:44:17,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0652173913043477) internal successors, (285), 138 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 4005 states and 4462 transitions. [2021-12-06 17:44:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 17:44:17,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:17,854 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:17,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-12-06 17:44:18,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-12-06 17:44:18,055 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:44:18,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:18,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1524746556, now seen corresponding path program 15 times [2021-12-06 17:44:18,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:18,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114761938] [2021-12-06 17:44:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:18,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 91 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:18,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:18,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114761938] [2021-12-06 17:44:18,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114761938] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:18,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570424118] [2021-12-06 17:44:18,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:44:18,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:18,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:18,459 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:18,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-06 17:44:19,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-06 17:44:19,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:44:19,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-06 17:44:19,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:19,111 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:44:19,111 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 17:44:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 121 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:20,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 159 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:21,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570424118] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:21,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:21,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 81 [2021-12-06 17:44:21,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790684013] [2021-12-06 17:44:21,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:21,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-06 17:44:21,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:21,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-06 17:44:21,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=5854, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 17:44:21,383 INFO L87 Difference]: Start difference. First operand 4005 states and 4462 transitions. Second operand has 82 states, 81 states have (on average 3.691358024691358) internal successors, (299), 82 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:30,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:30,368 INFO L93 Difference]: Finished difference Result 5358 states and 5844 transitions. [2021-12-06 17:44:30,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-12-06 17:44:30,368 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.691358024691358) internal successors, (299), 82 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-06 17:44:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:30,371 INFO L225 Difference]: With dead ends: 5358 [2021-12-06 17:44:30,371 INFO L226 Difference]: Without dead ends: 5201 [2021-12-06 17:44:30,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8866 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=9630, Invalid=30972, Unknown=0, NotChecked=0, Total=40602 [2021-12-06 17:44:30,373 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 2192 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 3111 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2192 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 3700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 3111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:30,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2192 Valid, 1466 Invalid, 3700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 3111 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 17:44:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-12-06 17:44:30,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 4029. [2021-12-06 17:44:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4029 states, 4026 states have (on average 1.1142573273720815) internal successors, (4486), 4028 states have internal predecessors, (4486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4029 states to 4029 states and 4486 transitions. [2021-12-06 17:44:30,399 INFO L78 Accepts]: Start accepts. Automaton has 4029 states and 4486 transitions. Word has length 103 [2021-12-06 17:44:30,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:30,400 INFO L470 AbstractCegarLoop]: Abstraction has 4029 states and 4486 transitions. [2021-12-06 17:44:30,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.691358024691358) internal successors, (299), 82 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4029 states and 4486 transitions. [2021-12-06 17:44:30,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 17:44:30,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:30,401 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:30,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-12-06 17:44:30,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-12-06 17:44:30,602 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:44:30,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:30,603 INFO L85 PathProgramCache]: Analyzing trace with hash -2080050579, now seen corresponding path program 21 times [2021-12-06 17:44:30,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:30,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455832451] [2021-12-06 17:44:30,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:30,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 153 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:30,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:30,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455832451] [2021-12-06 17:44:30,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455832451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:30,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160667855] [2021-12-06 17:44:30,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:44:30,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:30,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:30,943 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:30,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-06 17:44:32,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-06 17:44:32,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:44:32,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-06 17:44:32,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:32,882 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:44:32,882 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 17:44:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 190 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:33,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 231 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:34,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160667855] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:34,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:34,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 70 [2021-12-06 17:44:34,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909592158] [2021-12-06 17:44:34,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:34,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 17:44:34,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:34,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 17:44:34,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=4308, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 17:44:34,793 INFO L87 Difference]: Start difference. First operand 4029 states and 4486 transitions. Second operand has 71 states, 70 states have (on average 3.6714285714285713) internal successors, (257), 71 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:37,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:44:37,245 INFO L93 Difference]: Finished difference Result 4869 states and 5331 transitions. [2021-12-06 17:44:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 17:44:37,245 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 3.6714285714285713) internal successors, (257), 71 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have 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 17:44:37,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:44:37,248 INFO L225 Difference]: With dead ends: 4869 [2021-12-06 17:44:37,248 INFO L226 Difference]: Without dead ends: 4869 [2021-12-06 17:44:37,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2768, Invalid=11038, Unknown=0, NotChecked=0, Total=13806 [2021-12-06 17:44:37,249 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1124 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 1733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:44:37,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 1006 Invalid, 1733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 17:44:37,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4869 states. [2021-12-06 17:44:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4869 to 4038. [2021-12-06 17:44:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 4035 states have (on average 1.114002478314746) internal successors, (4495), 4037 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:37,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 4495 transitions. [2021-12-06 17:44:37,276 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 4495 transitions. Word has length 104 [2021-12-06 17:44:37,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:44:37,276 INFO L470 AbstractCegarLoop]: Abstraction has 4038 states and 4495 transitions. [2021-12-06 17:44:37,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 3.6714285714285713) internal successors, (257), 71 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:44:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 4495 transitions. [2021-12-06 17:44:37,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 17:44:37,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:44:37,277 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:44:37,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-12-06 17:44:37,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:37,478 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:44:37,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:44:37,479 INFO L85 PathProgramCache]: Analyzing trace with hash 761682340, now seen corresponding path program 16 times [2021-12-06 17:44:37,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:44:37,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076957634] [2021-12-06 17:44:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:44:37,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:44:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:44:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 92 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:44:37,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:44:37,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076957634] [2021-12-06 17:44:37,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076957634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:44:37,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508808671] [2021-12-06 17:44:37,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:44:37,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:44:37,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:44:37,886 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:44:37,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-06 17:44:38,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:44:38,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:44:38,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-06 17:44:38,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:44:38,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:38,090 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:44:38,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:44:38,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:44:38,395 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 17:44:41,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:44:41,301 INFO L354 Elim1Store]: treesize reduction 48, result has 58.6 percent of original size [2021-12-06 17:44:41,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 9 case distinctions, treesize of input 98 treesize of output 106 [2021-12-06 17:44:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-12-06 17:44:42,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:44:46,549 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 134 treesize of output 116 [2021-12-06 17:44:46,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:46,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 186 [2021-12-06 17:44:47,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:44:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-12-06 17:44:47,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508808671] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:44:47,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:44:47,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 38, 38] total 102 [2021-12-06 17:44:47,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540334742] [2021-12-06 17:44:47,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:44:47,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-12-06 17:44:47,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:44:47,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-12-06 17:44:47,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=9490, Unknown=0, NotChecked=0, Total=10506 [2021-12-06 17:44:47,628 INFO L87 Difference]: Start difference. First operand 4038 states and 4495 transitions. Second operand has 103 states, 102 states have (on average 2.1862745098039214) internal successors, (223), 103 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 17:45:06,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:06,354 INFO L93 Difference]: Finished difference Result 5186 states and 5756 transitions. [2021-12-06 17:45:06,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-12-06 17:45:06,354 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 2.1862745098039214) internal successors, (223), 103 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 104 [2021-12-06 17:45:06,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:06,357 INFO L225 Difference]: With dead ends: 5186 [2021-12-06 17:45:06,357 INFO L226 Difference]: Without dead ends: 4869 [2021-12-06 17:45:06,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16427 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=5319, Invalid=52041, Unknown=0, NotChecked=0, Total=57360 [2021-12-06 17:45:06,359 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 207 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 4147 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 4743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 4147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 451 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:06,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1351 Invalid, 4743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 4147 Invalid, 0 Unknown, 451 Unchecked, 2.1s Time] [2021-12-06 17:45:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4869 states. [2021-12-06 17:45:06,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4869 to 4052. [2021-12-06 17:45:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4052 states, 4049 states have (on average 1.130649543097061) internal successors, (4578), 4051 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:06,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4052 states to 4052 states and 4578 transitions. [2021-12-06 17:45:06,383 INFO L78 Accepts]: Start accepts. Automaton has 4052 states and 4578 transitions. Word has length 104 [2021-12-06 17:45:06,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:06,383 INFO L470 AbstractCegarLoop]: Abstraction has 4052 states and 4578 transitions. [2021-12-06 17:45:06,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 2.1862745098039214) internal successors, (223), 103 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 17:45:06,384 INFO L276 IsEmpty]: Start isEmpty. Operand 4052 states and 4578 transitions. [2021-12-06 17:45:06,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-06 17:45:06,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:06,385 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:06,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-12-06 17:45:06,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:06,586 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:45:06,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:06,587 INFO L85 PathProgramCache]: Analyzing trace with hash -954086487, now seen corresponding path program 17 times [2021-12-06 17:45:06,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:06,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694323998] [2021-12-06 17:45:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:06,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 72 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:07,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:07,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694323998] [2021-12-06 17:45:07,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694323998] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:07,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20644071] [2021-12-06 17:45:07,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:45:07,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:07,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:07,050 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:07,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-06 17:45:07,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-06 17:45:07,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:07,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-06 17:45:07,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:07,678 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:45:07,679 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 17:45:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 106 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:08,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 148 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:10,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20644071] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:45:10,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:45:10,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 82 [2021-12-06 17:45:10,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020905124] [2021-12-06 17:45:10,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:10,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-06 17:45:10,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:10,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-06 17:45:10,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=6105, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 17:45:10,070 INFO L87 Difference]: Start difference. First operand 4052 states and 4578 transitions. Second operand has 83 states, 82 states have (on average 3.5609756097560976) internal successors, (292), 83 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 17:45:17,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:17,975 INFO L93 Difference]: Finished difference Result 7095 states and 7686 transitions. [2021-12-06 17:45:17,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-12-06 17:45:17,975 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 3.5609756097560976) internal successors, (292), 83 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) Word has length 105 [2021-12-06 17:45:17,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:17,979 INFO L225 Difference]: With dead ends: 7095 [2021-12-06 17:45:17,979 INFO L226 Difference]: Without dead ends: 6975 [2021-12-06 17:45:17,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10176 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=9352, Invalid=32060, Unknown=0, NotChecked=0, Total=41412 [2021-12-06 17:45:17,980 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 1479 mSDsluCounter, 2211 mSDsCounter, 0 mSdLazyCounter, 5319 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 2302 SdHoareTripleChecker+Invalid, 5774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 5319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:17,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1479 Valid, 2302 Invalid, 5774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 5319 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 17:45:17,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6975 states. [2021-12-06 17:45:18,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6975 to 3884. [2021-12-06 17:45:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3884 states, 3881 states have (on average 1.1241947951558877) internal successors, (4363), 3883 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:18,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3884 states to 3884 states and 4363 transitions. [2021-12-06 17:45:18,011 INFO L78 Accepts]: Start accepts. Automaton has 3884 states and 4363 transitions. Word has length 105 [2021-12-06 17:45:18,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:18,011 INFO L470 AbstractCegarLoop]: Abstraction has 3884 states and 4363 transitions. [2021-12-06 17:45:18,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 3.5609756097560976) internal successors, (292), 83 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 17:45:18,012 INFO L276 IsEmpty]: Start isEmpty. Operand 3884 states and 4363 transitions. [2021-12-06 17:45:18,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-06 17:45:18,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:18,013 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:18,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-12-06 17:45:18,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:18,214 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:45:18,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:18,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1713592586, now seen corresponding path program 23 times [2021-12-06 17:45:18,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:18,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771053644] [2021-12-06 17:45:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:18,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 231 proven. 381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:18,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:18,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771053644] [2021-12-06 17:45:18,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771053644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:18,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415793837] [2021-12-06 17:45:18,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:45:18,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:18,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:18,712 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:18,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-06 17:45:18,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-06 17:45:18,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:18,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-06 17:45:18,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:18,954 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:45:18,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 17:45:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 276 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:20,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:45:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 325 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:21,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415793837] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:45:21,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:45:21,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 89 [2021-12-06 17:45:21,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382765580] [2021-12-06 17:45:21,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:45:21,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-12-06 17:45:21,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:45:21,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-12-06 17:45:21,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=957, Invalid=7053, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 17:45:21,579 INFO L87 Difference]: Start difference. First operand 3884 states and 4363 transitions. Second operand has 90 states, 89 states have (on average 3.3707865168539324) internal successors, (300), 90 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:25,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:45:25,371 INFO L93 Difference]: Finished difference Result 10079 states and 10735 transitions. [2021-12-06 17:45:25,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 17:45:25,371 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 3.3707865168539324) internal successors, (300), 90 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-06 17:45:25,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:45:25,377 INFO L225 Difference]: With dead ends: 10079 [2021-12-06 17:45:25,377 INFO L226 Difference]: Without dead ends: 10079 [2021-12-06 17:45:25,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4707 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4132, Invalid=17330, Unknown=0, NotChecked=0, Total=21462 [2021-12-06 17:45:25,378 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 978 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 5258 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 5468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 5258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:45:25,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 2295 Invalid, 5468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 5258 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 17:45:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10079 states. [2021-12-06 17:45:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10079 to 3893. [2021-12-06 17:45:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3893 states, 3890 states have (on average 1.1221079691516709) internal successors, (4365), 3892 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 4365 transitions. [2021-12-06 17:45:25,418 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 4365 transitions. Word has length 107 [2021-12-06 17:45:25,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:45:25,419 INFO L470 AbstractCegarLoop]: Abstraction has 3893 states and 4365 transitions. [2021-12-06 17:45:25,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 3.3707865168539324) internal successors, (300), 90 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:45:25,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 4365 transitions. [2021-12-06 17:45:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-06 17:45:25,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:45:25,420 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:45:25,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-12-06 17:45:25,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-12-06 17:45:25,621 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:45:25,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:45:25,622 INFO L85 PathProgramCache]: Analyzing trace with hash 977968501, now seen corresponding path program 22 times [2021-12-06 17:45:25,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:45:25,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467553012] [2021-12-06 17:45:25,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:45:25,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:45:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:45:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 24 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:45:26,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:45:26,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467553012] [2021-12-06 17:45:26,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467553012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:45:26,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851208420] [2021-12-06 17:45:26,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:45:26,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:45:26,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:45:26,880 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:45:26,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-12-06 17:45:27,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:45:27,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:45:27,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 168 conjunts are in the unsatisfiable core [2021-12-06 17:45:27,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:45:27,085 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:45:27,085 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 17:45:27,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17:45:27,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 17:45:27,973 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 17:45:28,212 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 17 treesize of output 19 [2021-12-06 17:45:32,462 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 17:45:34,738 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 17:45:49,716 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 17:45:58,640 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 17:46:06,554 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 17:46:14,727 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 17:46:22,527 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 17:46:34,840 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 17:46:50,248 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 17:46:58,575 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 17:46:58,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 17:46:58,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-12-06 17:46:58,800 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 186 proven. 305 refuted. 28 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:46:58,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:47:43,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:47:43,524 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 17:47:43,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:47:43,528 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 17:47:43,531 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 9 treesize of output 7 [2021-12-06 17:47:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 154 proven. 282 refuted. 83 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:47:45,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851208420] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:47:45,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:47:45,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 41, 41] total 129 [2021-12-06 17:47:45,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428398731] [2021-12-06 17:47:45,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:47:45,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-12-06 17:47:45,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:47:45,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-12-06 17:47:45,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=15262, Unknown=227, NotChecked=0, Total=16512 [2021-12-06 17:47:45,389 INFO L87 Difference]: Start difference. First operand 3893 states and 4365 transitions. Second operand has 129 states, 129 states have (on average 2.372093023255814) internal successors, (306), 129 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:48:23,276 INFO L93 Difference]: Finished difference Result 4118 states and 4618 transitions. [2021-12-06 17:48:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-06 17:48:23,276 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.372093023255814) internal successors, (306), 129 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-06 17:48:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:48:23,278 INFO L225 Difference]: With dead ends: 4118 [2021-12-06 17:48:23,278 INFO L226 Difference]: Without dead ends: 4063 [2021-12-06 17:48:23,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9013 ImplicationChecksByTransitivity, 173.6s TimeCoverageRelationStatistics Valid=2945, Invalid=38237, Unknown=230, NotChecked=0, Total=41412 [2021-12-06 17:48:23,280 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 584 mSDsluCounter, 5068 mSDsCounter, 0 mSdLazyCounter, 3144 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 5163 SdHoareTripleChecker+Invalid, 3904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 729 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:48:23,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 5163 Invalid, 3904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3144 Invalid, 0 Unknown, 729 Unchecked, 1.0s Time] [2021-12-06 17:48:23,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2021-12-06 17:48:23,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 4020. [2021-12-06 17:48:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4020 states, 4017 states have (on average 1.1217326362957432) internal successors, (4506), 4019 states have internal predecessors, (4506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 4506 transitions. [2021-12-06 17:48:23,302 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 4506 transitions. Word has length 108 [2021-12-06 17:48:23,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:48:23,302 INFO L470 AbstractCegarLoop]: Abstraction has 4020 states and 4506 transitions. [2021-12-06 17:48:23,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.372093023255814) internal successors, (306), 129 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:48:23,302 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 4506 transitions. [2021-12-06 17:48:23,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-06 17:48:23,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:48:23,304 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:48:23,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-12-06 17:48:23,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-12-06 17:48:23,505 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-06 17:48:23,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:48:23,506 INFO L85 PathProgramCache]: Analyzing trace with hash -129005884, now seen corresponding path program 18 times [2021-12-06 17:48:23,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:48:23,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017648869] [2021-12-06 17:48:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:48:23,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:48:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:48:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 60 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:23,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:48:23,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017648869] [2021-12-06 17:48:23,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017648869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:48:23,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768134588] [2021-12-06 17:48:23,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 17:48:23,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:48:23,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:48:23,897 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:48:23,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31277bd8-5c28-4127-a92f-6638954185d6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-12-06 17:48:24,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 17:48:24,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:48:24,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 17:48:24,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:48:24,984 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:48:24,985 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 17:48:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 73 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:26,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:48:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 136 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:48:27,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768134588] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:48:27,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:48:27,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 87 [2021-12-06 17:48:27,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311357570] [2021-12-06 17:48:27,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:48:27,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-06 17:48:27,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:48:27,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-06 17:48:27,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=836, Invalid=6820, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 17:48:27,537 INFO L87 Difference]: Start difference. First operand 4020 states and 4506 transitions. Second operand has 88 states, 87 states have (on average 3.6091954022988504) internal successors, (314), 88 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)