./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_tiling_tcpy.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_tiling_tcpy.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5446997f7b2d7b76d63a39784df785fb06bbab562e365ba547eeee8a855e283e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:45:15,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:45:15,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:45:15,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:45:15,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:45:15,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:45:15,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:45:15,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:45:15,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:45:15,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:45:15,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:45:15,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:45:15,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:45:15,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:45:15,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:45:15,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:45:15,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:45:15,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:45:15,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:45:15,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:45:15,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:45:15,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:45:15,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:45:15,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:45:15,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:45:15,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:45:15,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:45:15,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:45:15,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:45:16,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:45:16,001 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:45:16,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:45:16,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:45:16,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:45:16,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:45:16,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:45:16,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:45:16,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:45:16,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:45:16,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:45:16,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:45:16,014 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:45:16,063 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:45:16,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:45:16,064 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:45:16,065 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:45:16,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:45:16,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:45:16,074 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:45:16,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:45:16,075 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:45:16,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:45:16,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:45:16,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:45:16,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:45:16,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:45:16,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:45:16,078 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:45:16,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:45:16,078 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:45:16,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:45:16,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:45:16,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:45:16,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:45:16,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:45:16,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:45:16,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:45:16,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:45:16,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:45:16,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:45:16,081 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:45:16,083 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:45:16,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:45:16,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:45:16,084 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_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5446997f7b2d7b76d63a39784df785fb06bbab562e365ba547eeee8a855e283e [2021-11-09 10:45:16,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:45:16,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:45:16,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:45:16,498 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:45:16,499 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:45:16,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-cav19/array_tiling_tcpy.c [2021-11-09 10:45:16,589 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/data/6bab2b6d9/9110af6384c249b78eb3907139bf2e62/FLAG860e85cc9 [2021-11-09 10:45:17,204 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:45:17,205 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/sv-benchmarks/c/array-cav19/array_tiling_tcpy.c [2021-11-09 10:45:17,221 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/data/6bab2b6d9/9110af6384c249b78eb3907139bf2e62/FLAG860e85cc9 [2021-11-09 10:45:17,575 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/data/6bab2b6d9/9110af6384c249b78eb3907139bf2e62 [2021-11-09 10:45:17,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:45:17,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:45:17,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:45:17,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:45:17,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:45:17,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:45:17" (1/1) ... [2021-11-09 10:45:17,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@84ea60b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:17, skipping insertion in model container [2021-11-09 10:45:17,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:45:17" (1/1) ... [2021-11-09 10:45:17,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:45:17,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:45:17,825 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/sv-benchmarks/c/array-cav19/array_tiling_tcpy.c[408,421] [2021-11-09 10:45:17,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:45:17,869 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:45:17,883 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/sv-benchmarks/c/array-cav19/array_tiling_tcpy.c[408,421] [2021-11-09 10:45:17,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:45:17,907 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:45:17,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:17 WrapperNode [2021-11-09 10:45:17,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:45:17,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:45:17,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:45:17,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:45:17,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:17" (1/1) ... [2021-11-09 10:45:17,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:17" (1/1) ... [2021-11-09 10:45:17,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:45:17,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:45:17,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:45:17,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:45:17,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:17" (1/1) ... [2021-11-09 10:45:17,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:17" (1/1) ... [2021-11-09 10:45:17,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:17" (1/1) ... [2021-11-09 10:45:17,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:17" (1/1) ... [2021-11-09 10:45:17,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:17" (1/1) ... [2021-11-09 10:45:18,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:17" (1/1) ... [2021-11-09 10:45:18,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:17" (1/1) ... [2021-11-09 10:45:18,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:45:18,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:45:18,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:45:18,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:45:18,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:17" (1/1) ... [2021-11-09 10:45:18,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:45:18,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:18,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:45:18,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:45:18,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:45:18,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:45:18,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 10:45:18,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:45:18,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:45:18,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 10:45:18,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 10:45:18,409 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:45:18,409 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-09 10:45:18,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:45:18 BoogieIcfgContainer [2021-11-09 10:45:18,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:45:18,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:45:18,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:45:18,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:45:18,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:45:17" (1/3) ... [2021-11-09 10:45:18,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7ff33c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:45:18, skipping insertion in model container [2021-11-09 10:45:18,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:45:17" (2/3) ... [2021-11-09 10:45:18,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7ff33c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:45:18, skipping insertion in model container [2021-11-09 10:45:18,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:45:18" (3/3) ... [2021-11-09 10:45:18,421 INFO L111 eAbstractionObserver]: Analyzing ICFG array_tiling_tcpy.c [2021-11-09 10:45:18,426 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:45:18,427 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:45:18,480 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:45:18,487 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 10:45:18,487 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:45:18,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 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) [2021-11-09 10:45:18,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 10:45:18,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:18,511 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:18,511 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:18,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:18,518 INFO L85 PathProgramCache]: Analyzing trace with hash 333566837, now seen corresponding path program 1 times [2021-11-09 10:45:18,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:18,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264810822] [2021-11-09 10:45:18,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:18,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:18,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:18,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264810822] [2021-11-09 10:45:18,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264810822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:18,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:18,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:45:18,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348070591] [2021-11-09 10:45:18,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:45:18,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:18,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:45:18,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:45:18,789 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-11-09 10:45:18,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:18,834 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-11-09 10:45:18,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:45:18,836 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 [2021-11-09 10:45:18,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:18,844 INFO L225 Difference]: With dead ends: 35 [2021-11-09 10:45:18,844 INFO L226 Difference]: Without dead ends: 15 [2021-11-09 10:45:18,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:45:18,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-09 10:45:18,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-09 10:45:18,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-09 10:45:18,879 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-11-09 10:45:18,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:18,879 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-09 10:45:18,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-11-09 10:45:18,880 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-09 10:45:18,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 10:45:18,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:18,881 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:18,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:45:18,881 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:18,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:18,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1506334727, now seen corresponding path program 1 times [2021-11-09 10:45:18,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:18,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261871241] [2021-11-09 10:45:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:18,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:19,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:19,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261871241] [2021-11-09 10:45:19,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261871241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:19,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:19,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:45:19,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283749497] [2021-11-09 10:45:19,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:45:19,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:19,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:45:19,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:19,050 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:19,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:19,103 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-11-09 10:45:19,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:45:19,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-09 10:45:19,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:19,105 INFO L225 Difference]: With dead ends: 31 [2021-11-09 10:45:19,106 INFO L226 Difference]: Without dead ends: 23 [2021-11-09 10:45:19,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:45:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-09 10:45:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2021-11-09 10:45:19,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-09 10:45:19,113 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-11-09 10:45:19,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:19,114 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-09 10:45:19,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:19,114 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-09 10:45:19,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 10:45:19,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:19,116 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:19,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:45:19,119 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:19,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:19,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1461689335, now seen corresponding path program 1 times [2021-11-09 10:45:19,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:19,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597414049] [2021-11-09 10:45:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:19,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:19,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:19,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597414049] [2021-11-09 10:45:19,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597414049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:19,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792560913] [2021-11-09 10:45:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:19,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:19,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:19,451 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:19,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:45:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:19,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 10:45:19,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:19,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:45:19,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:19,801 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-11-09 10:45:19,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 39 [2021-11-09 10:45:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:20,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792560913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:20,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:20,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-09 10:45:20,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361369242] [2021-11-09 10:45:20,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:45:20,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:20,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:45:20,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:45:20,186 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:20,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:20,566 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-11-09 10:45:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:45:20,567 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 10:45:20,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:20,568 INFO L225 Difference]: With dead ends: 35 [2021-11-09 10:45:20,569 INFO L226 Difference]: Without dead ends: 28 [2021-11-09 10:45:20,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:45:20,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-09 10:45:20,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 20. [2021-11-09 10:45:20,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-09 10:45:20,576 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2021-11-09 10:45:20,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:20,576 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-09 10:45:20,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:20,577 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-09 10:45:20,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 10:45:20,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:20,578 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:20,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:20,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:20,783 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:20,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:20,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1706179349, now seen corresponding path program 1 times [2021-11-09 10:45:20,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:20,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725012186] [2021-11-09 10:45:20,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:20,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:21,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:21,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725012186] [2021-11-09 10:45:21,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725012186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:21,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191321465] [2021-11-09 10:45:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:21,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:21,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:21,299 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:21,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:45:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:21,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 10:45:21,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:21,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:45:21,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:21,571 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:45:21,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 59 [2021-11-09 10:45:21,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 10:45:21,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:45:21,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 10:45:21,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236373044] [2021-11-09 10:45:21,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:45:21,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:21,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:45:21,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:45:21,840 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:22,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:22,105 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-11-09 10:45:22,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:45:22,107 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-09 10:45:22,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:22,108 INFO L225 Difference]: With dead ends: 29 [2021-11-09 10:45:22,108 INFO L226 Difference]: Without dead ends: 27 [2021-11-09 10:45:22,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:45:22,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-09 10:45:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-11-09 10:45:22,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 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) [2021-11-09 10:45:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-09 10:45:22,121 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2021-11-09 10:45:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:22,122 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-09 10:45:22,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:22,123 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-09 10:45:22,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 10:45:22,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:22,126 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:22,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:22,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:22,355 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:22,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:22,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1952360863, now seen corresponding path program 2 times [2021-11-09 10:45:22,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:22,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10742908] [2021-11-09 10:45:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:22,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:22,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:22,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10742908] [2021-11-09 10:45:22,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10742908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:22,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461065675] [2021-11-09 10:45:22,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:45:22,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:22,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:22,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:22,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:45:22,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:45:22,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:22,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 10:45:22,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:22,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:45:23,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:23,132 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:45:23,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:45:25,174 INFO L354 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2021-11-09 10:45:25,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 93 treesize of output 49 [2021-11-09 10:45:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:25,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461065675] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:25,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:25,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-09 10:45:25,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893253561] [2021-11-09 10:45:25,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 10:45:25,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:25,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 10:45:25,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:45:25,212 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:26,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:26,665 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-11-09 10:45:26,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 10:45:26,667 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 10:45:26,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:26,668 INFO L225 Difference]: With dead ends: 49 [2021-11-09 10:45:26,669 INFO L226 Difference]: Without dead ends: 47 [2021-11-09 10:45:26,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:45:26,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-09 10:45:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2021-11-09 10:45:26,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:26,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-09 10:45:26,678 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2021-11-09 10:45:26,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:26,678 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-09 10:45:26,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:26,679 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-09 10:45:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 10:45:26,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:26,683 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:26,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:26,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:26,903 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:26,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:26,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1569342113, now seen corresponding path program 3 times [2021-11-09 10:45:26,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:26,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947665577] [2021-11-09 10:45:26,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:26,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:27,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:27,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947665577] [2021-11-09 10:45:27,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947665577] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:27,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826390139] [2021-11-09 10:45:27,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:45:27,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:27,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:27,254 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:27,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:45:27,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 10:45:27,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:27,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 10:45:27,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:27,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:45:27,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:27,627 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:45:27,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 59 [2021-11-09 10:45:27,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 10:45:27,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:45:27,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 10:45:27,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823337446] [2021-11-09 10:45:27,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:45:27,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:27,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:45:27,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:45:27,827 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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) [2021-11-09 10:45:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:28,228 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-11-09 10:45:28,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 10:45:28,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 10:45:28,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:28,231 INFO L225 Difference]: With dead ends: 54 [2021-11-09 10:45:28,231 INFO L226 Difference]: Without dead ends: 52 [2021-11-09 10:45:28,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:45:28,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-09 10:45:28,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2021-11-09 10:45:28,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:28,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-11-09 10:45:28,240 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2021-11-09 10:45:28,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:28,240 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-09 10:45:28,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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) [2021-11-09 10:45:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-11-09 10:45:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 10:45:28,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:28,242 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:28,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:28,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 10:45:28,444 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:28,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:28,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1656537897, now seen corresponding path program 4 times [2021-11-09 10:45:28,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:28,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775284814] [2021-11-09 10:45:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:28,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:29,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:29,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775284814] [2021-11-09 10:45:29,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775284814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:29,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145861864] [2021-11-09 10:45:29,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:45:29,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:29,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:29,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:29,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:45:29,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:45:29,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:29,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 10:45:29,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:29,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:45:29,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:29,407 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:45:29,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:45:29,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:29,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:29,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:29,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:29,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:29,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:29,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:29,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:29,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:29,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:29,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:29,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:29,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:29,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 111 [2021-11-09 10:45:31,168 INFO L354 Elim1Store]: treesize reduction 442, result has 1.6 percent of original size [2021-11-09 10:45:31,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 106 treesize of output 48 [2021-11-09 10:45:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:31,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145861864] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:31,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:31,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-11-09 10:45:31,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432191194] [2021-11-09 10:45:31,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:45:31,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:31,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:45:31,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:45:31,232 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:32,751 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2021-11-09 10:45:32,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 10:45:32,752 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-09 10:45:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:32,753 INFO L225 Difference]: With dead ends: 85 [2021-11-09 10:45:32,753 INFO L226 Difference]: Without dead ends: 83 [2021-11-09 10:45:32,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 10:45:32,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-09 10:45:32,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 39. [2021-11-09 10:45:32,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:32,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-09 10:45:32,774 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 27 [2021-11-09 10:45:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:32,777 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-09 10:45:32,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:32,778 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-09 10:45:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 10:45:32,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:32,781 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:32,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:32,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:32,994 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:32,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:32,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1509885875, now seen corresponding path program 5 times [2021-11-09 10:45:32,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:32,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278258342] [2021-11-09 10:45:32,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:32,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:33,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:33,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278258342] [2021-11-09 10:45:33,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278258342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:33,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914826989] [2021-11-09 10:45:33,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:45:33,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:33,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:33,126 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:33,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:45:33,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 10:45:33,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:33,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 10:45:33,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:33,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914826989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:33,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:33,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-11-09 10:45:33,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876224298] [2021-11-09 10:45:33,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 10:45:33,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:33,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 10:45:33,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:45:33,715 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:33,857 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2021-11-09 10:45:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 10:45:33,858 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 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 31 [2021-11-09 10:45:33,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:33,859 INFO L225 Difference]: With dead ends: 75 [2021-11-09 10:45:33,859 INFO L226 Difference]: Without dead ends: 51 [2021-11-09 10:45:33,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:45:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-09 10:45:33,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2021-11-09 10:45:33,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:33,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-11-09 10:45:33,871 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2021-11-09 10:45:33,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:33,872 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-11-09 10:45:33,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:33,872 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-11-09 10:45:33,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 10:45:33,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:33,874 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:33,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-09 10:45:34,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:34,103 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:34,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:34,103 INFO L85 PathProgramCache]: Analyzing trace with hash 150307147, now seen corresponding path program 6 times [2021-11-09 10:45:34,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:34,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711414945] [2021-11-09 10:45:34,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:34,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:34,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:34,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711414945] [2021-11-09 10:45:34,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711414945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:34,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377110500] [2021-11-09 10:45:34,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:45:34,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:34,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:34,983 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:34,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:45:35,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 10:45:35,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:35,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 10:45:35,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:35,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:45:35,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:35,433 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:45:35,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:45:35,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:35,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:35,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:35,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:35,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:35,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:35,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:35,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:35,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:35,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:35,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:35,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:35,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:35,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 101 [2021-11-09 10:45:37,459 INFO L354 Elim1Store]: treesize reduction 442, result has 1.6 percent of original size [2021-11-09 10:45:37,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 106 treesize of output 48 [2021-11-09 10:45:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:37,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377110500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:37,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:37,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-11-09 10:45:37,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873452935] [2021-11-09 10:45:37,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 10:45:37,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:37,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 10:45:37,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-11-09 10:45:37,517 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 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) [2021-11-09 10:45:40,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:40,825 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2021-11-09 10:45:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 10:45:40,826 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 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 33 [2021-11-09 10:45:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:40,828 INFO L225 Difference]: With dead ends: 93 [2021-11-09 10:45:40,828 INFO L226 Difference]: Without dead ends: 91 [2021-11-09 10:45:40,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 10:45:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-09 10:45:40,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 43. [2021-11-09 10:45:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:40,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-11-09 10:45:40,845 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 33 [2021-11-09 10:45:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:40,846 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-11-09 10:45:40,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 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) [2021-11-09 10:45:40,846 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-11-09 10:45:40,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 10:45:40,848 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:40,848 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:40,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:41,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-09 10:45:41,063 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:41,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:41,063 INFO L85 PathProgramCache]: Analyzing trace with hash 407055953, now seen corresponding path program 7 times [2021-11-09 10:45:41,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:41,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100762453] [2021-11-09 10:45:41,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:41,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:41,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:41,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100762453] [2021-11-09 10:45:41,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100762453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:41,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708642932] [2021-11-09 10:45:41,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:45:41,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:41,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:41,663 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:41,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 10:45:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:42,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 10:45:42,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:42,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:45:42,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:42,268 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:45:42,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:45:42,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:42,499 INFO L354 Elim1Store]: treesize reduction 396, result has 9.6 percent of original size [2021-11-09 10:45:42,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 125 [2021-11-09 10:45:42,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 10:45:42,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:45:42,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-09 10:45:42,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341293621] [2021-11-09 10:45:42,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 10:45:42,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:42,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 10:45:42,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:45:42,936 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:43,454 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2021-11-09 10:45:43,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:45:43,454 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-09 10:45:43,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:43,455 INFO L225 Difference]: With dead ends: 86 [2021-11-09 10:45:43,456 INFO L226 Difference]: Without dead ends: 84 [2021-11-09 10:45:43,456 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:45:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-09 10:45:43,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 43. [2021-11-09 10:45:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:43,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-11-09 10:45:43,470 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 33 [2021-11-09 10:45:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:43,471 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-11-09 10:45:43,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-11-09 10:45:43,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 10:45:43,473 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:43,473 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:43,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:43,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 10:45:43,687 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:43,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:43,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1387011391, now seen corresponding path program 8 times [2021-11-09 10:45:43,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:43,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53878701] [2021-11-09 10:45:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:43,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:44,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:44,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53878701] [2021-11-09 10:45:44,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53878701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:44,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124851505] [2021-11-09 10:45:44,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:45:44,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:44,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:44,585 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:44,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 10:45:44,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:45:44,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:44,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 10:45:44,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:44,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:45:45,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:45,068 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:45:45,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:45:45,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:45,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:45,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:45,279 INFO L354 Elim1Store]: treesize reduction 329, result has 11.3 percent of original size [2021-11-09 10:45:45,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 93 treesize of output 111 [2021-11-09 10:45:45,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:45,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:45,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:45,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:45,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:45,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:45,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:45,577 INFO L354 Elim1Store]: treesize reduction 729, result has 8.6 percent of original size [2021-11-09 10:45:45,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 22 case distinctions, treesize of input 141 treesize of output 171 [2021-11-09 10:45:48,516 INFO L354 Elim1Store]: treesize reduction 1610, result has 0.4 percent of original size [2021-11-09 10:45:48,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 179 treesize of output 61 [2021-11-09 10:45:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:48,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124851505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:48,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:48,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-11-09 10:45:48,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676683772] [2021-11-09 10:45:48,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 10:45:48,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:48,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 10:45:48,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:45:48,563 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:52,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:52,380 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2021-11-09 10:45:52,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 10:45:52,381 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 10:45:52,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:52,382 INFO L225 Difference]: With dead ends: 78 [2021-11-09 10:45:52,383 INFO L226 Difference]: Without dead ends: 76 [2021-11-09 10:45:52,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=368, Invalid=2082, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 10:45:52,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-09 10:45:52,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 48. [2021-11-09 10:45:52,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:52,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-11-09 10:45:52,401 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 37 [2021-11-09 10:45:52,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:52,401 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-11-09 10:45:52,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:52,402 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-11-09 10:45:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 10:45:52,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:52,404 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:52,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:52,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 10:45:52,623 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:52,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:52,624 INFO L85 PathProgramCache]: Analyzing trace with hash -732455737, now seen corresponding path program 9 times [2021-11-09 10:45:52,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:52,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762764620] [2021-11-09 10:45:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:52,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:53,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:53,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762764620] [2021-11-09 10:45:53,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762764620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:53,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149000099] [2021-11-09 10:45:53,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:45:53,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:53,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:53,019 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:53,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 10:45:53,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 10:45:53,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:53,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 10:45:53,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:53,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:45:53,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:53,784 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:45:53,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 59 [2021-11-09 10:45:53,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 10:45:53,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:45:53,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 10:45:53,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387403790] [2021-11-09 10:45:53,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 10:45:53,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:53,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 10:45:53,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:45:53,923 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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) [2021-11-09 10:45:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:45:54,582 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2021-11-09 10:45:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 10:45:54,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 37 [2021-11-09 10:45:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:45:54,584 INFO L225 Difference]: With dead ends: 97 [2021-11-09 10:45:54,584 INFO L226 Difference]: Without dead ends: 95 [2021-11-09 10:45:54,585 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:45:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-09 10:45:54,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 45. [2021-11-09 10:45:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:54,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-11-09 10:45:54,600 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 37 [2021-11-09 10:45:54,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:45:54,601 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-11-09 10:45:54,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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) [2021-11-09 10:45:54,601 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-11-09 10:45:54,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-09 10:45:54,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:45:54,603 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:54,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:54,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 10:45:54,818 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:45:54,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:54,819 INFO L85 PathProgramCache]: Analyzing trace with hash -718195393, now seen corresponding path program 10 times [2021-11-09 10:45:54,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:54,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828201393] [2021-11-09 10:45:54,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:54,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:55,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:55,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828201393] [2021-11-09 10:45:55,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828201393] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:55,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231074534] [2021-11-09 10:45:55,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:45:55,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:55,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:55,637 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:55,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 10:45:56,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:45:56,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:56,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 10:45:56,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:56,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:45:56,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:56,462 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:45:56,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:45:56,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:56,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:56,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:56,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:56,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:56,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:56,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:56,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:56,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:56,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:56,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:56,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:56,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:45:56,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 111 [2021-11-09 10:45:59,442 INFO L354 Elim1Store]: treesize reduction 738, result has 0.9 percent of original size [2021-11-09 10:45:59,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 136 treesize of output 56 [2021-11-09 10:45:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:59,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231074534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:59,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:59,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-11-09 10:45:59,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504717447] [2021-11-09 10:45:59,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 10:45:59,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:59,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 10:45:59,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:45:59,480 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:04,390 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2021-11-09 10:46:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 10:46:04,391 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 [2021-11-09 10:46:04,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:04,392 INFO L225 Difference]: With dead ends: 126 [2021-11-09 10:46:04,392 INFO L226 Difference]: Without dead ends: 124 [2021-11-09 10:46:04,394 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=539, Invalid=3001, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 10:46:04,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-09 10:46:04,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 51. [2021-11-09 10:46:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:04,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2021-11-09 10:46:04,414 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 39 [2021-11-09 10:46:04,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:04,414 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2021-11-09 10:46:04,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:04,415 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2021-11-09 10:46:04,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 10:46:04,416 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:04,417 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:04,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:04,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:04,630 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:04,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:04,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1343789367, now seen corresponding path program 11 times [2021-11-09 10:46:04,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:04,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480494520] [2021-11-09 10:46:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:04,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 51 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:04,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:04,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480494520] [2021-11-09 10:46:04,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480494520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:04,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651676724] [2021-11-09 10:46:04,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:46:04,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:04,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:04,803 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:04,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 10:46:05,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-09 10:46:05,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:05,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 10:46:05,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 72 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:05,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651676724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:05,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:05,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-11-09 10:46:05,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005144746] [2021-11-09 10:46:05,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 10:46:05,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:05,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 10:46:05,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:46:05,863 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:06,066 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-11-09 10:46:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 10:46:06,067 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-09 10:46:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:06,068 INFO L225 Difference]: With dead ends: 99 [2021-11-09 10:46:06,068 INFO L226 Difference]: Without dead ends: 67 [2021-11-09 10:46:06,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:46:06,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-09 10:46:06,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-11-09 10:46:06,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:06,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-11-09 10:46:06,101 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 41 [2021-11-09 10:46:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:06,102 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-11-09 10:46:06,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:06,102 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-11-09 10:46:06,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 10:46:06,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:06,105 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:06,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:06,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:06,322 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:06,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:06,323 INFO L85 PathProgramCache]: Analyzing trace with hash -873694027, now seen corresponding path program 12 times [2021-11-09 10:46:06,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:06,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178716426] [2021-11-09 10:46:06,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:06,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:07,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:07,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178716426] [2021-11-09 10:46:07,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178716426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:07,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103836820] [2021-11-09 10:46:07,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:46:07,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:07,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:07,229 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:07,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 10:46:08,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 10:46:08,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:08,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 10:46:08,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:08,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:46:08,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,156 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:46:08,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:46:08,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,343 INFO L354 Elim1Store]: treesize reduction 329, result has 11.3 percent of original size [2021-11-09 10:46:08,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 93 treesize of output 111 [2021-11-09 10:46:08,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:08,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 171 [2021-11-09 10:46:16,188 INFO L354 Elim1Store]: treesize reduction 1610, result has 0.4 percent of original size [2021-11-09 10:46:16,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 180 treesize of output 62 [2021-11-09 10:46:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:16,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103836820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:16,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:16,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 33 [2021-11-09 10:46:16,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405789495] [2021-11-09 10:46:16,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 10:46:16,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:16,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 10:46:16,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=926, Unknown=2, NotChecked=0, Total=1056 [2021-11-09 10:46:16,233 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:25,689 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2021-11-09 10:46:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-09 10:46:25,690 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 10:46:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:25,691 INFO L225 Difference]: With dead ends: 126 [2021-11-09 10:46:25,691 INFO L226 Difference]: Without dead ends: 124 [2021-11-09 10:46:25,694 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=571, Invalid=3979, Unknown=6, NotChecked=0, Total=4556 [2021-11-09 10:46:25,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-09 10:46:25,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 56. [2021-11-09 10:46:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:25,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-11-09 10:46:25,726 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 43 [2021-11-09 10:46:25,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:25,726 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-11-09 10:46:25,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:25,727 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-11-09 10:46:25,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 10:46:25,733 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:25,733 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:25,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:25,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:25,958 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:25,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:25,959 INFO L85 PathProgramCache]: Analyzing trace with hash -851394631, now seen corresponding path program 13 times [2021-11-09 10:46:25,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:25,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871588091] [2021-11-09 10:46:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:25,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:27,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:27,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871588091] [2021-11-09 10:46:27,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871588091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:27,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075172154] [2021-11-09 10:46:27,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:46:27,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:27,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:27,040 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:27,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 10:46:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:27,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 10:46:27,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:27,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:46:28,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:28,125 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:46:28,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:46:28,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:28,296 INFO L354 Elim1Store]: treesize reduction 341, result has 9.8 percent of original size [2021-11-09 10:46:28,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 107 [2021-11-09 10:46:28,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 10:46:28,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:46:28,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 10:46:28,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820236572] [2021-11-09 10:46:28,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:46:28,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:28,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:46:28,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:46:28,569 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:29,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:29,635 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2021-11-09 10:46:29,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 10:46:29,636 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 10:46:29,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:29,636 INFO L225 Difference]: With dead ends: 116 [2021-11-09 10:46:29,637 INFO L226 Difference]: Without dead ends: 114 [2021-11-09 10:46:29,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=386, Invalid=2476, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 10:46:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-09 10:46:29,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 58. [2021-11-09 10:46:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.105263157894737) internal successors, (63), 57 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2021-11-09 10:46:29,662 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 45 [2021-11-09 10:46:29,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:29,663 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2021-11-09 10:46:29,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:29,663 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2021-11-09 10:46:29,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 10:46:29,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:29,664 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:29,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:29,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 10:46:29,875 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:29,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:29,875 INFO L85 PathProgramCache]: Analyzing trace with hash -601155285, now seen corresponding path program 14 times [2021-11-09 10:46:29,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:29,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657260067] [2021-11-09 10:46:29,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:29,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:31,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:31,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657260067] [2021-11-09 10:46:31,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657260067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:31,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004567145] [2021-11-09 10:46:31,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:46:31,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:31,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:31,322 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:31,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 10:46:32,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:46:32,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:32,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-09 10:46:32,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:32,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:46:32,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,142 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:46:32,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:46:32,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,310 INFO L354 Elim1Store]: treesize reduction 277, result has 11.2 percent of original size [2021-11-09 10:46:32,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 97 [2021-11-09 10:46:32,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,545 INFO L354 Elim1Store]: treesize reduction 590, result has 8.7 percent of original size [2021-11-09 10:46:32,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 22 case distinctions, treesize of input 115 treesize of output 145 [2021-11-09 10:46:32,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:32,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 57 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 203 [2021-11-09 10:46:36,403 INFO L354 Elim1Store]: treesize reduction 1618, result has 0.4 percent of original size [2021-11-09 10:46:36,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 10 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 166 treesize of output 60 [2021-11-09 10:46:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:36,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004567145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:36,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:36,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-11-09 10:46:36,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139667262] [2021-11-09 10:46:36,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 10:46:36,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:36,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 10:46:36,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 10:46:36,451 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 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) [2021-11-09 10:46:40,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:40,203 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2021-11-09 10:46:40,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-09 10:46:40,204 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 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 47 [2021-11-09 10:46:40,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:40,205 INFO L225 Difference]: With dead ends: 136 [2021-11-09 10:46:40,205 INFO L226 Difference]: Without dead ends: 134 [2021-11-09 10:46:40,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=687, Invalid=4863, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 10:46:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-09 10:46:40,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 62. [2021-11-09 10:46:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.098360655737705) internal successors, (67), 61 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:40,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-11-09 10:46:40,231 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 47 [2021-11-09 10:46:40,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:40,232 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-11-09 10:46:40,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 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) [2021-11-09 10:46:40,232 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-11-09 10:46:40,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 10:46:40,233 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:40,233 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:40,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:40,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 10:46:40,438 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:40,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:40,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2106626767, now seen corresponding path program 15 times [2021-11-09 10:46:40,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:40,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995997236] [2021-11-09 10:46:40,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:40,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:40,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:40,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995997236] [2021-11-09 10:46:40,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995997236] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:40,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965827882] [2021-11-09 10:46:40,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:46:40,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:40,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:40,961 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:40,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 10:46:41,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 10:46:41,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:41,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 10:46:41,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:41,975 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 10 treesize of output 8 [2021-11-09 10:46:42,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:42,195 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:46:42,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:46:43,386 INFO L354 Elim1Store]: treesize reduction 240, result has 2.8 percent of original size [2021-11-09 10:46:43,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 90 treesize of output 42 [2021-11-09 10:46:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:43,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965827882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:43,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:43,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-11-09 10:46:43,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667842457] [2021-11-09 10:46:43,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 10:46:43,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:43,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 10:46:43,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1165, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 10:46:43,426 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:46,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:46,324 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2021-11-09 10:46:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-09 10:46:46,325 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 10:46:46,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:46,326 INFO L225 Difference]: With dead ends: 118 [2021-11-09 10:46:46,326 INFO L226 Difference]: Without dead ends: 116 [2021-11-09 10:46:46,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=424, Invalid=4132, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 10:46:46,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-09 10:46:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 63. [2021-11-09 10:46:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-11-09 10:46:46,348 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 47 [2021-11-09 10:46:46,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:46,349 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-11-09 10:46:46,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:46,349 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-11-09 10:46:46,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 10:46:46,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:46,350 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:46,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:46,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 10:46:46,550 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:46,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:46,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1386564553, now seen corresponding path program 16 times [2021-11-09 10:46:46,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:46,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396283300] [2021-11-09 10:46:46,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:46,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 1 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:47,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:47,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396283300] [2021-11-09 10:46:47,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396283300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:47,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498397668] [2021-11-09 10:46:47,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:46:47,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:47,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:47,492 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:47,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 10:46:48,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:46:48,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:48,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 10:46:48,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:48,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:46:48,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:48,903 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:46:48,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:46:49,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:49,103 INFO L354 Elim1Store]: treesize reduction 396, result has 9.6 percent of original size [2021-11-09 10:46:49,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 112 treesize of output 130 [2021-11-09 10:46:49,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:49,527 INFO L354 Elim1Store]: treesize reduction 884, result has 7.1 percent of original size [2021-11-09 10:46:49,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 26 case distinctions, treesize of input 166 treesize of output 196 [2021-11-09 10:46:51,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 10:46:51,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:46:51,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-09 10:46:51,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696986992] [2021-11-09 10:46:51,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 10:46:51,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:51,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 10:46:51,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:46:51,250 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:52,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:52,088 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2021-11-09 10:46:52,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 10:46:52,088 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-09 10:46:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:52,090 INFO L225 Difference]: With dead ends: 144 [2021-11-09 10:46:52,090 INFO L226 Difference]: Without dead ends: 142 [2021-11-09 10:46:52,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 10:46:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-09 10:46:52,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 60. [2021-11-09 10:46:52,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:52,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-11-09 10:46:52,122 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 47 [2021-11-09 10:46:52,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:52,122 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-11-09 10:46:52,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:52,123 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-11-09 10:46:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 10:46:52,124 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:52,124 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:52,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:52,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:52,346 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:52,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:52,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1008846289, now seen corresponding path program 17 times [2021-11-09 10:46:52,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:52,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794749330] [2021-11-09 10:46:52,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:52,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:53,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:53,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794749330] [2021-11-09 10:46:53,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794749330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:53,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307330838] [2021-11-09 10:46:53,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:46:53,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:53,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:53,273 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:53,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 10:46:54,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-09 10:46:54,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:54,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 10:46:54,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:54,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:46:55,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:55,330 INFO L354 Elim1Store]: treesize reduction 51, result has 19.0 percent of original size [2021-11-09 10:46:55,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 43 [2021-11-09 10:46:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:56,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307330838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:56,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:56,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-11-09 10:46:56,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56823066] [2021-11-09 10:46:56,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 10:46:56,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:56,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 10:46:56,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 10:46:56,443 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 37 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:58,422 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2021-11-09 10:46:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 10:46:58,423 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 37 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 49 [2021-11-09 10:46:58,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:58,424 INFO L225 Difference]: With dead ends: 127 [2021-11-09 10:46:58,424 INFO L226 Difference]: Without dead ends: 125 [2021-11-09 10:46:58,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=531, Invalid=5321, Unknown=0, NotChecked=0, Total=5852 [2021-11-09 10:46:58,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-09 10:46:58,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 57. [2021-11-09 10:46:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-11-09 10:46:58,454 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 49 [2021-11-09 10:46:58,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:58,455 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-11-09 10:46:58,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:58,455 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-11-09 10:46:58,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 10:46:58,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:58,456 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:58,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-09 10:46:58,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:58,667 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:46:58,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:58,667 INFO L85 PathProgramCache]: Analyzing trace with hash 976915105, now seen corresponding path program 18 times [2021-11-09 10:46:58,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:58,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941046697] [2021-11-09 10:46:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:58,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 99 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:58,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:58,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941046697] [2021-11-09 10:46:58,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941046697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:58,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190731671] [2021-11-09 10:46:58,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:46:58,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:58,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:58,883 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:58,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 10:47:00,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-09 10:47:00,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:00,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 10:47:00,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 128 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:00,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190731671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:00,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:00,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-11-09 10:47:00,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435849764] [2021-11-09 10:47:00,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 10:47:00,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:00,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 10:47:00,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:47:00,634 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:00,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:00,856 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2021-11-09 10:47:00,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 10:47:00,857 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-09 10:47:00,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:00,858 INFO L225 Difference]: With dead ends: 117 [2021-11-09 10:47:00,858 INFO L226 Difference]: Without dead ends: 77 [2021-11-09 10:47:00,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2021-11-09 10:47:00,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-09 10:47:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2021-11-09 10:47:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-11-09 10:47:00,885 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 51 [2021-11-09 10:47:00,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:00,885 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-11-09 10:47:00,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:00,885 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-11-09 10:47:00,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 10:47:00,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:00,886 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:00,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-09 10:47:01,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 10:47:01,086 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:01,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:01,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1098290265, now seen corresponding path program 19 times [2021-11-09 10:47:01,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:01,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688462508] [2021-11-09 10:47:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:01,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:02,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:02,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688462508] [2021-11-09 10:47:02,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688462508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:02,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826804811] [2021-11-09 10:47:02,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:47:02,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:02,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:02,007 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:02,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 10:47:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:03,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 10:47:03,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:03,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:47:03,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:03,557 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:47:03,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:47:03,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:03,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:03,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:03,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:03,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:03,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:03,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:03,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:03,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:03,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:03,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:03,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:03,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:03,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 111 [2021-11-09 10:47:12,167 INFO L354 Elim1Store]: treesize reduction 738, result has 0.9 percent of original size [2021-11-09 10:47:12,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 136 treesize of output 56 [2021-11-09 10:47:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:12,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826804811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:12,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:12,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 35 [2021-11-09 10:47:12,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698686860] [2021-11-09 10:47:12,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 10:47:12,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:12,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 10:47:12,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1057, Unknown=1, NotChecked=0, Total=1190 [2021-11-09 10:47:12,216 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:46,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:46,718 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2021-11-09 10:47:46,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-09 10:47:46,721 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-09 10:47:46,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:46,722 INFO L225 Difference]: With dead ends: 161 [2021-11-09 10:47:46,722 INFO L226 Difference]: Without dead ends: 159 [2021-11-09 10:47:46,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2379 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=707, Invalid=7297, Unknown=6, NotChecked=0, Total=8010 [2021-11-09 10:47:46,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-09 10:47:46,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 61. [2021-11-09 10:47:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 60 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2021-11-09 10:47:46,758 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 51 [2021-11-09 10:47:46,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:46,759 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2021-11-09 10:47:46,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:46,759 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2021-11-09 10:47:46,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 10:47:46,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:46,760 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:46,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-09 10:47:46,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:46,967 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:47:46,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:46,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1566484639, now seen corresponding path program 20 times [2021-11-09 10:47:46,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:46,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143204366] [2021-11-09 10:47:46,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:46,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:47,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:47,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143204366] [2021-11-09 10:47:47,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143204366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:47,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940450509] [2021-11-09 10:47:47,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:47:47,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:47,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:47,978 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:47,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 10:47:49,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:47:49,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:47:49,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 10:47:49,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:49,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:47:49,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:49,529 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:47:49,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:47:49,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:49,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:49,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:49,737 INFO L354 Elim1Store]: treesize reduction 329, result has 11.3 percent of original size [2021-11-09 10:47:49,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 93 treesize of output 111 [2021-11-09 10:47:49,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:49,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:49,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:49,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:49,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:49,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:49,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,065 INFO L354 Elim1Store]: treesize reduction 729, result has 8.6 percent of original size [2021-11-09 10:47:50,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 22 case distinctions, treesize of input 141 treesize of output 171 [2021-11-09 10:47:50,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:50,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 57 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 231 [2021-11-09 10:48:03,813 INFO L354 Elim1Store]: treesize reduction 2818, result has 0.2 percent of original size [2021-11-09 10:48:03,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 224 treesize of output 68 [2021-11-09 10:48:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:03,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940450509] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:03,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:03,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 40 [2021-11-09 10:48:03,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091230697] [2021-11-09 10:48:03,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 10:48:03,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:03,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 10:48:03,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1385, Unknown=8, NotChecked=0, Total=1560 [2021-11-09 10:48:03,877 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:25,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:25,320 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2021-11-09 10:48:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-09 10:48:25,321 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 10:48:25,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:25,322 INFO L225 Difference]: With dead ends: 152 [2021-11-09 10:48:25,322 INFO L226 Difference]: Without dead ends: 150 [2021-11-09 10:48:25,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=748, Invalid=5883, Unknown=11, NotChecked=0, Total=6642 [2021-11-09 10:48:25,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-09 10:48:25,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 66. [2021-11-09 10:48:25,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-11-09 10:48:25,359 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 53 [2021-11-09 10:48:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:25,360 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-11-09 10:48:25,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:25,360 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-11-09 10:48:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 10:48:25,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:25,361 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:25,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:25,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:25,561 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:25,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:25,562 INFO L85 PathProgramCache]: Analyzing trace with hash -868081629, now seen corresponding path program 21 times [2021-11-09 10:48:25,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:25,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135438822] [2021-11-09 10:48:25,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:25,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:26,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:26,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135438822] [2021-11-09 10:48:26,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135438822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:26,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828660550] [2021-11-09 10:48:26,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:48:26,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:26,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:26,263 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:26,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 10:48:28,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-09 10:48:28,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:28,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 10:48:28,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:28,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:48:28,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:28,585 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:48:28,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 59 [2021-11-09 10:48:28,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 10:48:28,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:48:28,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 10:48:28,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857045084] [2021-11-09 10:48:28,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:48:28,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:28,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:48:28,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-11-09 10:48:28,724 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:30,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:30,347 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2021-11-09 10:48:30,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 10:48:30,348 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 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) Word has length 55 [2021-11-09 10:48:30,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:30,349 INFO L225 Difference]: With dead ends: 140 [2021-11-09 10:48:30,349 INFO L226 Difference]: Without dead ends: 138 [2021-11-09 10:48:30,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=218, Invalid=2538, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 10:48:30,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-09 10:48:30,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 63. [2021-11-09 10:48:30,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:30,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-11-09 10:48:30,390 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 55 [2021-11-09 10:48:30,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:30,390 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-11-09 10:48:30,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:30,390 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-11-09 10:48:30,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 10:48:30,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:30,391 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:30,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:30,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 10:48:30,594 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:30,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:30,595 INFO L85 PathProgramCache]: Analyzing trace with hash -814661611, now seen corresponding path program 22 times [2021-11-09 10:48:30,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:30,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801976611] [2021-11-09 10:48:30,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:30,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:32,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:32,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801976611] [2021-11-09 10:48:32,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801976611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:32,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565581317] [2021-11-09 10:48:32,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:48:32,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:32,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:32,395 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:32,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 10:48:34,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:48:34,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:34,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 10:48:34,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:34,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:48:34,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,174 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:48:34,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:48:34,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,363 INFO L354 Elim1Store]: treesize reduction 329, result has 11.3 percent of original size [2021-11-09 10:48:34,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 93 treesize of output 111 [2021-11-09 10:48:34,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,668 INFO L354 Elim1Store]: treesize reduction 590, result has 8.7 percent of original size [2021-11-09 10:48:34,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 22 case distinctions, treesize of input 115 treesize of output 145 [2021-11-09 10:48:34,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,100 INFO L354 Elim1Store]: treesize reduction 999, result has 7.2 percent of original size [2021-11-09 10:48:35,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 13 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 41 case distinctions, treesize of input 151 treesize of output 193 [2021-11-09 10:48:35,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:35,509 INFO L244 Elim1Store]: Index analysis took 110 ms [2021-11-09 10:48:35,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 91 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 241 [2021-11-09 10:48:41,279 INFO L354 Elim1Store]: treesize reduction 2482, result has 0.3 percent of original size [2021-11-09 10:48:41,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 22 select indices, 22 select index equivalence classes, 15 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 231 case distinctions, treesize of input 196 treesize of output 66 [2021-11-09 10:48:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:41,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565581317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:41,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:41,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2021-11-09 10:48:41,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921221295] [2021-11-09 10:48:41,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 10:48:41,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:41,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 10:48:41,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 10:48:41,346 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:47,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:47,537 INFO L93 Difference]: Finished difference Result 196 states and 201 transitions. [2021-11-09 10:48:47,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-09 10:48:47,538 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-09 10:48:47,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:47,539 INFO L225 Difference]: With dead ends: 196 [2021-11-09 10:48:47,540 INFO L226 Difference]: Without dead ends: 194 [2021-11-09 10:48:47,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2407 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=873, Invalid=7499, Unknown=0, NotChecked=0, Total=8372 [2021-11-09 10:48:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-09 10:48:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 104. [2021-11-09 10:48:47,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.058252427184466) internal successors, (109), 103 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) [2021-11-09 10:48:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-11-09 10:48:47,612 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 57 [2021-11-09 10:48:47,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:47,612 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-11-09 10:48:47,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:48:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-11-09 10:48:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 10:48:47,614 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:47,614 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:47,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:47,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 10:48:47,843 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:48:47,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:47,843 INFO L85 PathProgramCache]: Analyzing trace with hash -541315557, now seen corresponding path program 23 times [2021-11-09 10:48:47,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:47,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759252845] [2021-11-09 10:48:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:47,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:48,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:48,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759252845] [2021-11-09 10:48:48,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759252845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:48,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934582234] [2021-11-09 10:48:48,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:48:48,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:48,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:48,802 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:48,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 10:48:51,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-09 10:48:51,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:48:51,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 10:48:51,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:51,631 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 [2021-11-09 10:48:51,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:51,874 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:48:51,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:48:52,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:52,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:52,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:52,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:52,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:52,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:52,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:52,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:52,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:52,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:52,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:52,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:52,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:52,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 111 [2021-11-09 10:49:01,078 INFO L354 Elim1Store]: treesize reduction 738, result has 0.9 percent of original size [2021-11-09 10:49:01,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 136 treesize of output 56 [2021-11-09 10:49:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:01,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934582234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:01,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:01,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 38 [2021-11-09 10:49:01,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335816883] [2021-11-09 10:49:01,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 10:49:01,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:01,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 10:49:01,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1258, Unknown=3, NotChecked=0, Total=1406 [2021-11-09 10:49:01,129 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:35,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:35,259 INFO L93 Difference]: Finished difference Result 205 states and 211 transitions. [2021-11-09 10:49:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-09 10:49:35,259 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-09 10:49:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:35,261 INFO L225 Difference]: With dead ends: 205 [2021-11-09 10:49:35,261 INFO L226 Difference]: Without dead ends: 203 [2021-11-09 10:49:35,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3586 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=849, Invalid=10702, Unknown=5, NotChecked=0, Total=11556 [2021-11-09 10:49:35,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-09 10:49:35,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 72. [2021-11-09 10:49:35,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 71 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:35,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2021-11-09 10:49:35,299 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 57 [2021-11-09 10:49:35,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:35,300 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2021-11-09 10:49:35,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:35,300 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2021-11-09 10:49:35,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 10:49:35,301 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:35,301 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:35,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:35,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 10:49:35,505 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:35,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:35,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1054813323, now seen corresponding path program 24 times [2021-11-09 10:49:35,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:35,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169318183] [2021-11-09 10:49:35,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:35,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 163 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:35,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:35,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169318183] [2021-11-09 10:49:35,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169318183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:35,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414539430] [2021-11-09 10:49:35,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:49:35,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:35,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:35,743 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:35,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 10:49:37,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-09 10:49:37,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:37,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 10:49:37,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 200 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:38,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414539430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:38,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:38,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2021-11-09 10:49:38,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917100989] [2021-11-09 10:49:38,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 10:49:38,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:38,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 10:49:38,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2021-11-09 10:49:38,343 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 32 states, 32 states have (on average 3.3125) internal successors, (106), 32 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:38,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:38,653 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2021-11-09 10:49:38,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 10:49:38,654 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.3125) internal successors, (106), 32 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 61 [2021-11-09 10:49:38,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:38,654 INFO L225 Difference]: With dead ends: 168 [2021-11-09 10:49:38,654 INFO L226 Difference]: Without dead ends: 120 [2021-11-09 10:49:38,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 10:49:38,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-09 10:49:38,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2021-11-09 10:49:38,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:38,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-11-09 10:49:38,700 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 61 [2021-11-09 10:49:38,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:38,700 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-11-09 10:49:38,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.3125) internal successors, (106), 32 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:38,701 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-11-09 10:49:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 10:49:38,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:38,702 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:38,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:38,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 10:49:38,906 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:38,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:38,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1151505815, now seen corresponding path program 25 times [2021-11-09 10:49:38,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:38,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800393843] [2021-11-09 10:49:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:38,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:39,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:39,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800393843] [2021-11-09 10:49:39,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800393843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:39,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829044009] [2021-11-09 10:49:39,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:49:39,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:39,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:39,871 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:39,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 10:49:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:41,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 10:49:41,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:41,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:49:42,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:42,123 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:49:42,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 59 [2021-11-09 10:49:42,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 10:49:42,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:49:42,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-09 10:49:42,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413008029] [2021-11-09 10:49:42,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 10:49:42,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:42,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 10:49:42,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-11-09 10:49:42,257 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:43,906 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2021-11-09 10:49:43,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-09 10:49:43,906 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-09 10:49:43,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:43,907 INFO L225 Difference]: With dead ends: 154 [2021-11-09 10:49:43,907 INFO L226 Difference]: Without dead ends: 152 [2021-11-09 10:49:43,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=244, Invalid=3178, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 10:49:43,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-09 10:49:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 69. [2021-11-09 10:49:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-11-09 10:49:43,942 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 61 [2021-11-09 10:49:43,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:43,942 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-11-09 10:49:43,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-11-09 10:49:43,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 10:49:43,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:43,943 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:43,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:44,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 10:49:44,144 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:49:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:44,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1747739913, now seen corresponding path program 26 times [2021-11-09 10:49:44,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:44,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523915964] [2021-11-09 10:49:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:44,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:45,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:45,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523915964] [2021-11-09 10:49:45,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523915964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:45,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232887920] [2021-11-09 10:49:45,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:49:45,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:45,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:45,558 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:45,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 10:49:47,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:49:47,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:47,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 10:49:47,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:47,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:49:47,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:47,624 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:49:47,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:49:47,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:47,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:47,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:47,837 INFO L354 Elim1Store]: treesize reduction 289, result has 11.3 percent of original size [2021-11-09 10:49:47,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 83 treesize of output 101 [2021-11-09 10:49:48,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,168 INFO L354 Elim1Store]: treesize reduction 660, result has 8.7 percent of original size [2021-11-09 10:49:48,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 22 case distinctions, treesize of input 129 treesize of output 159 [2021-11-09 10:49:48,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,538 INFO L354 Elim1Store]: treesize reduction 1174, result has 7.1 percent of original size [2021-11-09 10:49:48,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 13 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 41 case distinctions, treesize of input 177 treesize of output 219 [2021-11-09 10:49:48,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:48,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 91 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 245 [2021-11-09 10:49:54,536 INFO L354 Elim1Store]: treesize reduction 2482, result has 0.3 percent of original size [2021-11-09 10:49:54,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 22 select indices, 22 select index equivalence classes, 15 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 231 case distinctions, treesize of input 196 treesize of output 66 [2021-11-09 10:49:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:54,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232887920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:54,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:54,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2021-11-09 10:49:54,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840646398] [2021-11-09 10:49:54,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-09 10:49:54,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:54,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-09 10:49:54,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2228, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 10:49:54,597 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 50 states, 50 states have (on average 2.44) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:02,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:02,165 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2021-11-09 10:50:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-09 10:50:02,166 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.44) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-09 10:50:02,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:02,167 INFO L225 Difference]: With dead ends: 171 [2021-11-09 10:50:02,167 INFO L226 Difference]: Without dead ends: 169 [2021-11-09 10:50:02,169 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2804 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=968, Invalid=8734, Unknown=0, NotChecked=0, Total=9702 [2021-11-09 10:50:02,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-09 10:50:02,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 73. [2021-11-09 10:50:02,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-11-09 10:50:02,218 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 63 [2021-11-09 10:50:02,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:02,218 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-11-09 10:50:02,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.44) internal successors, (122), 50 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:02,219 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-11-09 10:50:02,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 10:50:02,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:02,220 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:02,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:02,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 10:50:02,424 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:02,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:02,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1571086351, now seen corresponding path program 27 times [2021-11-09 10:50:02,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:02,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543721139] [2021-11-09 10:50:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:02,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:03,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:03,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543721139] [2021-11-09 10:50:03,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543721139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:03,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806888321] [2021-11-09 10:50:03,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:50:03,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:03,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:03,436 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:03,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 10:50:06,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 10:50:06,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:06,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-09 10:50:06,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:06,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:50:07,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:07,064 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:50:07,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:50:07,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:07,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:07,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:07,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:07,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:07,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:07,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:07,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:07,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:07,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:07,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:07,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:07,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:07,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 111 [2021-11-09 10:50:11,024 INFO L354 Elim1Store]: treesize reduction 738, result has 0.9 percent of original size [2021-11-09 10:50:11,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 136 treesize of output 56 [2021-11-09 10:50:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:11,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806888321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:11,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:11,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 41 [2021-11-09 10:50:11,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770457818] [2021-11-09 10:50:11,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 10:50:11,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:11,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 10:50:11,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 10:50:11,069 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 41 states, 41 states have (on average 2.6097560975609757) internal successors, (107), 41 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:16,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:16,746 INFO L93 Difference]: Finished difference Result 226 states and 232 transitions. [2021-11-09 10:50:16,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-09 10:50:16,751 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.6097560975609757) internal successors, (107), 41 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-09 10:50:16,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:16,753 INFO L225 Difference]: With dead ends: 226 [2021-11-09 10:50:16,753 INFO L226 Difference]: Without dead ends: 224 [2021-11-09 10:50:16,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4394 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=936, Invalid=13106, Unknown=0, NotChecked=0, Total=14042 [2021-11-09 10:50:16,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-09 10:50:16,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 78. [2021-11-09 10:50:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.077922077922078) internal successors, (83), 77 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:16,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2021-11-09 10:50:16,812 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 63 [2021-11-09 10:50:16,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:16,813 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2021-11-09 10:50:16,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.6097560975609757) internal successors, (107), 41 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:16,813 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2021-11-09 10:50:16,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:50:16,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:16,814 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:16,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:17,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:17,027 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:17,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:17,028 INFO L85 PathProgramCache]: Analyzing trace with hash 181843839, now seen corresponding path program 28 times [2021-11-09 10:50:17,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:17,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659870510] [2021-11-09 10:50:17,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:17,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:18,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:18,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659870510] [2021-11-09 10:50:18,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659870510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:18,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798197204] [2021-11-09 10:50:18,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:50:18,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:18,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:18,377 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:18,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 10:50:20,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:50:20,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:20,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-09 10:50:20,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:20,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:50:20,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:20,777 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:50:20,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:50:20,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:20,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:20,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:20,951 INFO L354 Elim1Store]: treesize reduction 329, result has 11.3 percent of original size [2021-11-09 10:50:20,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 93 treesize of output 111 [2021-11-09 10:50:21,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,208 INFO L354 Elim1Store]: treesize reduction 729, result has 8.6 percent of original size [2021-11-09 10:50:21,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 22 case distinctions, treesize of input 141 treesize of output 171 [2021-11-09 10:50:21,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,579 INFO L354 Elim1Store]: treesize reduction 999, result has 7.2 percent of original size [2021-11-09 10:50:21,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 13 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 41 case distinctions, treesize of input 151 treesize of output 193 [2021-11-09 10:50:21,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:21,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,110 INFO L354 Elim1Store]: treesize reduction 1504, result has 6.1 percent of original size [2021-11-09 10:50:22,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 21 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 187 treesize of output 241 [2021-11-09 10:50:22,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,577 INFO L244 Elim1Store]: Index analysis took 120 ms [2021-11-09 10:50:22,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 22 select indices, 22 select index equivalence classes, 133 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 289 [2021-11-09 10:50:29,981 INFO L354 Elim1Store]: treesize reduction 3530, result has 0.2 percent of original size [2021-11-09 10:50:29,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 26 select indices, 26 select index equivalence classes, 21 disjoint index pairs (out of 325 index pairs), introduced 26 new quantified variables, introduced 325 case distinctions, treesize of input 226 treesize of output 72 [2021-11-09 10:50:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:30,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798197204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:30,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:30,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 51 [2021-11-09 10:50:30,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439195488] [2021-11-09 10:50:30,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 10:50:30,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:30,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 10:50:30,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2314, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 10:50:30,044 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:38,786 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2021-11-09 10:50:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-09 10:50:38,787 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 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) Word has length 67 [2021-11-09 10:50:38,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:38,788 INFO L225 Difference]: With dead ends: 188 [2021-11-09 10:50:38,788 INFO L226 Difference]: Without dead ends: 186 [2021-11-09 10:50:38,788 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2995 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1017, Invalid=9285, Unknown=0, NotChecked=0, Total=10302 [2021-11-09 10:50:38,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-09 10:50:38,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 82. [2021-11-09 10:50:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 81 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-11-09 10:50:38,843 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 67 [2021-11-09 10:50:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:38,843 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-11-09 10:50:38,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:50:38,844 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-11-09 10:50:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:50:38,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:38,844 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:38,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-09 10:50:39,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:39,047 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:50:39,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:39,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1240350597, now seen corresponding path program 29 times [2021-11-09 10:50:39,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:39,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816610847] [2021-11-09 10:50:39,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:39,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:40,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:40,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816610847] [2021-11-09 10:50:40,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816610847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:40,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498704708] [2021-11-09 10:50:40,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:50:40,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:40,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:40,203 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:40,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 10:50:44,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-09 10:50:44,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:50:44,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-09 10:50:44,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:44,319 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 10 treesize of output 8 [2021-11-09 10:50:44,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,489 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:50:44,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:50:44,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,671 INFO L354 Elim1Store]: treesize reduction 329, result has 11.3 percent of original size [2021-11-09 10:50:44,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 93 treesize of output 111 [2021-11-09 10:50:44,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:44,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 171 [2021-11-09 10:50:51,276 INFO L354 Elim1Store]: treesize reduction 1610, result has 0.4 percent of original size [2021-11-09 10:50:51,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 180 treesize of output 62 [2021-11-09 10:50:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:51,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498704708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:51,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:51,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 45 [2021-11-09 10:50:51,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286051934] [2021-11-09 10:50:51,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 10:50:51,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:51,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 10:50:51,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1792, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 10:50:51,334 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 45 states, 45 states have (on average 2.6) internal successors, (117), 45 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:03,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:03,051 INFO L93 Difference]: Finished difference Result 231 states and 237 transitions. [2021-11-09 10:51:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-09 10:51:03,051 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6) internal successors, (117), 45 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have 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 [2021-11-09 10:51:03,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:03,053 INFO L225 Difference]: With dead ends: 231 [2021-11-09 10:51:03,053 INFO L226 Difference]: Without dead ends: 229 [2021-11-09 10:51:03,054 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5294 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1136, Invalid=15374, Unknown=2, NotChecked=0, Total=16512 [2021-11-09 10:51:03,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-09 10:51:03,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 82. [2021-11-09 10:51:03,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 81 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-11-09 10:51:03,127 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 67 [2021-11-09 10:51:03,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:03,127 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-11-09 10:51:03,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.6) internal successors, (117), 45 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:03,128 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-11-09 10:51:03,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:51:03,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:03,129 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:03,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:03,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:03,354 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:03,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:03,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1063697035, now seen corresponding path program 30 times [2021-11-09 10:51:03,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:03,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734507692] [2021-11-09 10:51:03,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:03,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:04,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:04,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734507692] [2021-11-09 10:51:04,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734507692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:04,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757725329] [2021-11-09 10:51:04,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:51:04,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:04,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:04,310 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:04,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 10:51:10,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-09 10:51:10,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:10,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-09 10:51:10,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:10,094 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 [2021-11-09 10:51:10,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:10,389 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:51:10,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 59 [2021-11-09 10:51:10,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 10:51:10,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:51:10,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-09 10:51:10,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202559767] [2021-11-09 10:51:10,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:51:10,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:10,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:51:10,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:51:10,515 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:12,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:12,385 INFO L93 Difference]: Finished difference Result 173 states and 178 transitions. [2021-11-09 10:51:12,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-09 10:51:12,386 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-09 10:51:12,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:12,387 INFO L225 Difference]: With dead ends: 173 [2021-11-09 10:51:12,387 INFO L226 Difference]: Without dead ends: 171 [2021-11-09 10:51:12,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=246, Invalid=4044, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 10:51:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-09 10:51:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 82. [2021-11-09 10:51:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 81 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-11-09 10:51:12,459 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 67 [2021-11-09 10:51:12,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:12,459 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-11-09 10:51:12,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:12,459 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-11-09 10:51:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 10:51:12,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:12,460 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:12,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:12,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-09 10:51:12,660 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:12,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:12,661 INFO L85 PathProgramCache]: Analyzing trace with hash -762913035, now seen corresponding path program 31 times [2021-11-09 10:51:12,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:12,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050499158] [2021-11-09 10:51:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:12,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 243 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:13,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:13,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050499158] [2021-11-09 10:51:13,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050499158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:13,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551575361] [2021-11-09 10:51:13,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:51:13,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:13,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:13,032 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:13,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 10:51:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:15,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 10:51:15,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 288 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:16,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551575361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:16,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:16,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 37 [2021-11-09 10:51:16,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795021989] [2021-11-09 10:51:16,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 10:51:16,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:16,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 10:51:16,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=988, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 10:51:16,526 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:16,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:16,942 INFO L93 Difference]: Finished difference Result 194 states and 199 transitions. [2021-11-09 10:51:16,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 10:51:16,943 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-09 10:51:16,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:16,944 INFO L225 Difference]: With dead ends: 194 [2021-11-09 10:51:16,944 INFO L226 Difference]: Without dead ends: 138 [2021-11-09 10:51:16,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=442, Invalid=1450, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 10:51:16,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-09 10:51:17,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2021-11-09 10:51:17,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 81 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) [2021-11-09 10:51:17,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-11-09 10:51:17,034 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 71 [2021-11-09 10:51:17,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:17,034 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-11-09 10:51:17,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.3513513513513513) internal successors, (124), 37 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:17,035 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-11-09 10:51:17,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 10:51:17,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:17,035 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:17,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:17,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 10:51:17,262 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:17,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:17,263 INFO L85 PathProgramCache]: Analyzing trace with hash 720303099, now seen corresponding path program 32 times [2021-11-09 10:51:17,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:17,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860154252] [2021-11-09 10:51:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:17,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:18,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:18,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860154252] [2021-11-09 10:51:18,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860154252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:18,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393921212] [2021-11-09 10:51:18,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:51:18,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:18,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:18,533 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:18,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 10:51:21,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:51:21,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:21,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-09 10:51:21,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:21,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:51:21,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:21,697 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:51:21,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:51:21,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:21,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:21,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:21,913 INFO L354 Elim1Store]: treesize reduction 329, result has 11.3 percent of original size [2021-11-09 10:51:21,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 93 treesize of output 111 [2021-11-09 10:51:22,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,186 INFO L354 Elim1Store]: treesize reduction 729, result has 8.6 percent of original size [2021-11-09 10:51:22,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 22 case distinctions, treesize of input 141 treesize of output 171 [2021-11-09 10:51:22,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:22,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 57 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 231 [2021-11-09 10:51:32,631 INFO L354 Elim1Store]: treesize reduction 2818, result has 0.2 percent of original size [2021-11-09 10:51:32,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 224 treesize of output 68 [2021-11-09 10:51:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:32,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393921212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:32,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:32,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 49 [2021-11-09 10:51:32,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63891884] [2021-11-09 10:51:32,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 10:51:32,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:32,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 10:51:32,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2133, Unknown=1, NotChecked=0, Total=2352 [2021-11-09 10:51:32,696 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 49 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 49 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:51:43,048 INFO L93 Difference]: Finished difference Result 217 states and 222 transitions. [2021-11-09 10:51:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-09 10:51:43,048 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 49 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) Word has length 71 [2021-11-09 10:51:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:51:43,049 INFO L225 Difference]: With dead ends: 217 [2021-11-09 10:51:43,049 INFO L226 Difference]: Without dead ends: 215 [2021-11-09 10:51:43,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4466 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1178, Invalid=13339, Unknown=3, NotChecked=0, Total=14520 [2021-11-09 10:51:43,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-09 10:51:43,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 81. [2021-11-09 10:51:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0625) internal successors, (85), 80 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:43,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-11-09 10:51:43,110 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 71 [2021-11-09 10:51:43,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:51:43,110 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-11-09 10:51:43,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 49 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:51:43,111 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-11-09 10:51:43,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 10:51:43,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:51:43,112 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:51:43,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 10:51:43,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 10:51:43,322 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:51:43,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:51:43,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1778809857, now seen corresponding path program 33 times [2021-11-09 10:51:43,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:51:43,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436324370] [2021-11-09 10:51:43,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:51:43,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:51:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:51:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:44,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:51:44,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436324370] [2021-11-09 10:51:44,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436324370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:44,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982149227] [2021-11-09 10:51:44,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:51:44,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:51:44,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:51:44,329 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:51:44,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 10:51:48,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-09 10:51:48,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:51:48,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-09 10:51:48,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:51:48,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:51:48,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:48,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:48,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:51:48,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:51:55,216 INFO L354 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2021-11-09 10:51:55,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 94 treesize of output 50 [2021-11-09 10:51:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:51:55,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982149227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:51:55,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:51:55,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 42 [2021-11-09 10:51:55,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729762844] [2021-11-09 10:51:55,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 10:51:55,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:51:55,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 10:51:55,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1575, Unknown=2, NotChecked=0, Total=1722 [2021-11-09 10:51:55,272 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 42 states, 42 states have (on average 2.7857142857142856) internal successors, (117), 42 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:06,027 INFO L93 Difference]: Finished difference Result 172 states and 177 transitions. [2021-11-09 10:52:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-09 10:52:06,028 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.7857142857142856) internal successors, (117), 42 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-09 10:52:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:06,028 INFO L225 Difference]: With dead ends: 172 [2021-11-09 10:52:06,028 INFO L226 Difference]: Without dead ends: 170 [2021-11-09 10:52:06,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1743 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=531, Invalid=6949, Unknown=2, NotChecked=0, Total=7482 [2021-11-09 10:52:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-09 10:52:06,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 84. [2021-11-09 10:52:06,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:06,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2021-11-09 10:52:06,090 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 71 [2021-11-09 10:52:06,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:06,090 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2021-11-09 10:52:06,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.7857142857142856) internal successors, (117), 42 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2021-11-09 10:52:06,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 10:52:06,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:06,092 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:06,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:06,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:06,302 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:06,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:06,303 INFO L85 PathProgramCache]: Analyzing trace with hash -818015757, now seen corresponding path program 34 times [2021-11-09 10:52:06,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:06,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71830598] [2021-11-09 10:52:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:06,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:52:08,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:08,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71830598] [2021-11-09 10:52:08,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71830598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:08,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315592077] [2021-11-09 10:52:08,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:52:08,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:08,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:08,387 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:08,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 10:52:11,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:52:11,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:11,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 10:52:11,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:11,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:52:11,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:11,877 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:52:11,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:52:11,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:11,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:11,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,032 INFO L354 Elim1Store]: treesize reduction 329, result has 11.3 percent of original size [2021-11-09 10:52:12,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 93 treesize of output 111 [2021-11-09 10:52:12,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,255 INFO L354 Elim1Store]: treesize reduction 606, result has 8.7 percent of original size [2021-11-09 10:52:12,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 22 case distinctions, treesize of input 119 treesize of output 149 [2021-11-09 10:52:12,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,625 INFO L354 Elim1Store]: treesize reduction 1087, result has 7.2 percent of original size [2021-11-09 10:52:12,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 13 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 41 case distinctions, treesize of input 165 treesize of output 207 [2021-11-09 10:52:12,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:12,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,180 INFO L354 Elim1Store]: treesize reduction 1715, result has 6.1 percent of original size [2021-11-09 10:52:13,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 21 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 213 treesize of output 267 [2021-11-09 10:52:13,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:13,585 INFO L244 Elim1Store]: Index analysis took 109 ms [2021-11-09 10:52:13,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 22 select indices, 22 select index equivalence classes, 133 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 293 [2021-11-09 10:52:21,472 INFO L354 Elim1Store]: treesize reduction 3530, result has 0.2 percent of original size [2021-11-09 10:52:21,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 26 select indices, 26 select index equivalence classes, 21 disjoint index pairs (out of 325 index pairs), introduced 26 new quantified variables, introduced 325 case distinctions, treesize of input 226 treesize of output 72 [2021-11-09 10:52:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:52:21,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315592077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:21,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:21,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31] total 55 [2021-11-09 10:52:21,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075019826] [2021-11-09 10:52:21,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 10:52:21,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:21,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 10:52:21,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2671, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 10:52:21,536 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 55 states, 55 states have (on average 2.5090909090909093) internal successors, (138), 55 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:28,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:28,832 INFO L93 Difference]: Finished difference Result 202 states and 208 transitions. [2021-11-09 10:52:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-09 10:52:28,833 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.5090909090909093) internal successors, (138), 55 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have 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 [2021-11-09 10:52:28,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:28,834 INFO L225 Difference]: With dead ends: 202 [2021-11-09 10:52:28,834 INFO L226 Difference]: Without dead ends: 200 [2021-11-09 10:52:28,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2856 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=846, Invalid=8274, Unknown=0, NotChecked=0, Total=9120 [2021-11-09 10:52:28,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-09 10:52:28,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 88. [2021-11-09 10:52:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 87 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2021-11-09 10:52:28,918 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 73 [2021-11-09 10:52:28,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:28,918 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2021-11-09 10:52:28,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.5090909090909093) internal successors, (138), 55 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:28,919 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2021-11-09 10:52:28,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 10:52:28,919 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:28,919 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:28,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:29,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:29,120 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:29,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:29,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1723707135, now seen corresponding path program 35 times [2021-11-09 10:52:29,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:29,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397893456] [2021-11-09 10:52:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:29,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:52:30,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:30,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397893456] [2021-11-09 10:52:30,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397893456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:30,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036868119] [2021-11-09 10:52:30,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:52:30,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:30,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:30,395 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:30,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 10:52:37,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-09 10:52:37,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:37,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-09 10:52:37,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:37,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:52:37,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:37,416 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:52:37,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 59 [2021-11-09 10:52:37,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 10:52:37,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:52:37,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-09 10:52:37,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922258256] [2021-11-09 10:52:37,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 10:52:37,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:37,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 10:52:37,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2021-11-09 10:52:37,562 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:39,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:39,975 INFO L93 Difference]: Finished difference Result 187 states and 192 transitions. [2021-11-09 10:52:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-09 10:52:39,975 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 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) Word has length 73 [2021-11-09 10:52:39,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:39,977 INFO L225 Difference]: With dead ends: 187 [2021-11-09 10:52:39,977 INFO L226 Difference]: Without dead ends: 185 [2021-11-09 10:52:39,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=269, Invalid=4843, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 10:52:39,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-09 10:52:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 85. [2021-11-09 10:52:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 84 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2021-11-09 10:52:40,056 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 73 [2021-11-09 10:52:40,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:40,057 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2021-11-09 10:52:40,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:52:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2021-11-09 10:52:40,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 10:52:40,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:40,057 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:40,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:40,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 10:52:40,258 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:52:40,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:40,258 INFO L85 PathProgramCache]: Analyzing trace with hash -748907913, now seen corresponding path program 36 times [2021-11-09 10:52:40,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:40,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883716899] [2021-11-09 10:52:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:40,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:52:41,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:41,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883716899] [2021-11-09 10:52:41,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883716899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:41,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304573124] [2021-11-09 10:52:41,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:52:41,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:41,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:41,579 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:41,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 10:52:47,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-09 10:52:47,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:52:47,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 10:52:47,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:47,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:52:47,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:47,368 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:52:47,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:52:47,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:47,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:47,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:47,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:47,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:47,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:47,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:47,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:47,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:47,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:47,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:47,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:47,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:47,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 111 [2021-11-09 10:52:58,854 INFO L354 Elim1Store]: treesize reduction 738, result has 0.9 percent of original size [2021-11-09 10:52:58,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 136 treesize of output 56 [2021-11-09 10:52:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:52:58,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304573124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:58,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:58,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 47 [2021-11-09 10:52:58,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895548344] [2021-11-09 10:52:58,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 10:52:58,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:58,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 10:52:58,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1976, Unknown=2, NotChecked=0, Total=2162 [2021-11-09 10:52:58,912 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 47 states, 47 states have (on average 2.702127659574468) internal successors, (127), 47 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:53,245 INFO L93 Difference]: Finished difference Result 271 states and 278 transitions. [2021-11-09 10:53:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-09 10:53:53,246 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.702127659574468) internal successors, (127), 47 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) Word has length 75 [2021-11-09 10:53:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:53,247 INFO L225 Difference]: With dead ends: 271 [2021-11-09 10:53:53,247 INFO L226 Difference]: Without dead ends: 269 [2021-11-09 10:53:53,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6362 ImplicationChecksByTransitivity, 55.1s TimeCoverageRelationStatistics Valid=1114, Invalid=18906, Unknown=2, NotChecked=0, Total=20022 [2021-11-09 10:53:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-09 10:53:53,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 90. [2021-11-09 10:53:53,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0786516853932584) internal successors, (96), 89 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-11-09 10:53:53,342 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 75 [2021-11-09 10:53:53,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:53,343 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-11-09 10:53:53,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.702127659574468) internal successors, (127), 47 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:53:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-11-09 10:53:53,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 10:53:53,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:53,343 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:53,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 10:53:53,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 10:53:53,544 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:53:53,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:53,544 INFO L85 PathProgramCache]: Analyzing trace with hash 101965673, now seen corresponding path program 37 times [2021-11-09 10:53:53,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:53,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495948899] [2021-11-09 10:53:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:53,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:53:55,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:55,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495948899] [2021-11-09 10:53:55,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495948899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:55,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720938394] [2021-11-09 10:53:55,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:53:55,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:55,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:53:55,163 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:53:55,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 10:53:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:59,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-09 10:53:59,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:53:59,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:53:59,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,143 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:53:59,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:53:59,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,376 INFO L354 Elim1Store]: treesize reduction 277, result has 11.2 percent of original size [2021-11-09 10:53:59,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 97 [2021-11-09 10:53:59,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,634 INFO L354 Elim1Store]: treesize reduction 590, result has 8.7 percent of original size [2021-11-09 10:53:59,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 22 case distinctions, treesize of input 115 treesize of output 145 [2021-11-09 10:53:59,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:59,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,002 INFO L354 Elim1Store]: treesize reduction 999, result has 7.2 percent of original size [2021-11-09 10:54:00,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 13 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 41 case distinctions, treesize of input 151 treesize of output 193 [2021-11-09 10:54:00,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,596 INFO L354 Elim1Store]: treesize reduction 1586, result has 6.1 percent of original size [2021-11-09 10:54:00,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 21 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 66 case distinctions, treesize of input 197 treesize of output 251 [2021-11-09 10:54:00,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:00,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,491 INFO L354 Elim1Store]: treesize reduction 2324, result has 5.3 percent of original size [2021-11-09 10:54:01,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 22 select indices, 22 select index equivalence classes, 31 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 97 case distinctions, treesize of input 245 treesize of output 311 [2021-11-09 10:54:01,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:01,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:02,117 INFO L244 Elim1Store]: Index analysis took 201 ms [2021-11-09 10:54:02,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 26 select indices, 26 select index equivalence classes, 183 disjoint index pairs (out of 325 index pairs), introduced 26 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 371 [2021-11-09 10:54:13,519 INFO L354 Elim1Store]: treesize reduction 4762, result has 0.1 percent of original size [2021-11-09 10:54:13,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 30 select indices, 30 select index equivalence classes, 28 disjoint index pairs (out of 435 index pairs), introduced 30 new quantified variables, introduced 435 case distinctions, treesize of input 256 treesize of output 78 [2021-11-09 10:54:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:13,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720938394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:13,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:54:13,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 33] total 58 [2021-11-09 10:54:13,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121643342] [2021-11-09 10:54:13,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-09 10:54:13,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:54:13,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-09 10:54:13,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=3021, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 10:54:13,595 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 58 states, 58 states have (on average 2.5344827586206895) internal successors, (147), 58 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:24,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:24,572 INFO L93 Difference]: Finished difference Result 222 states and 229 transitions. [2021-11-09 10:54:24,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-09 10:54:24,573 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.5344827586206895) internal successors, (147), 58 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-09 10:54:24,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:24,574 INFO L225 Difference]: With dead ends: 222 [2021-11-09 10:54:24,574 INFO L226 Difference]: Without dead ends: 220 [2021-11-09 10:54:24,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3913 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1238, Invalid=12102, Unknown=0, NotChecked=0, Total=13340 [2021-11-09 10:54:24,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-09 10:54:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 95. [2021-11-09 10:54:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.074468085106383) internal successors, (101), 94 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2021-11-09 10:54:24,665 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 77 [2021-11-09 10:54:24,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:24,665 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2021-11-09 10:54:24,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.5344827586206895) internal successors, (147), 58 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:54:24,666 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2021-11-09 10:54:24,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 10:54:24,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:24,666 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:24,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:24,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 10:54:24,867 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:54:24,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:24,867 INFO L85 PathProgramCache]: Analyzing trace with hash -566854163, now seen corresponding path program 38 times [2021-11-09 10:54:24,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:54:24,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978551090] [2021-11-09 10:54:24,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:24,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:54:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:26,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:54:26,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978551090] [2021-11-09 10:54:26,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978551090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:26,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923641672] [2021-11-09 10:54:26,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:54:26,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:54:26,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:54:26,143 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:54:26,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 10:54:30,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:54:30,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:54:30,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-09 10:54:30,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:30,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 10:54:30,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:30,893 INFO L354 Elim1Store]: treesize reduction 69, result has 17.9 percent of original size [2021-11-09 10:54:30,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2021-11-09 10:54:31,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,066 INFO L354 Elim1Store]: treesize reduction 329, result has 11.3 percent of original size [2021-11-09 10:54:31,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 93 treesize of output 111 [2021-11-09 10:54:31,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:31,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 171 [2021-11-09 10:54:45,219 INFO L354 Elim1Store]: treesize reduction 1610, result has 0.4 percent of original size [2021-11-09 10:54:45,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 180 treesize of output 62 [2021-11-09 10:54:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 388 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:45,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923641672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:45,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:54:45,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 52 [2021-11-09 10:54:45,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175565599] [2021-11-09 10:54:45,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 10:54:45,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:54:45,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 10:54:45,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=2354, Unknown=2, NotChecked=0, Total=2652 [2021-11-09 10:54:45,273 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 52 states, 52 states have (on average 2.6538461538461537) internal successors, (138), 52 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:55:00,451 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-09 10:55:00,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-09 10:55:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 10:55:00,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 10:55:00,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:55:00,654 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:621) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:371) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:174) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:140) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:869) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 56 more [2021-11-09 10:55:00,660 INFO L168 Benchmark]: Toolchain (without parser) took 583074.88 ms. Allocated memory was 88.1 MB in the beginning and 885.0 MB in the end (delta: 796.9 MB). Free memory was 52.1 MB in the beginning and 338.0 MB in the end (delta: -285.8 MB). Peak memory consumption was 511.1 MB. Max. memory is 16.1 GB. [2021-11-09 10:55:00,660 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 88.1 MB. Free memory was 68.6 MB in the beginning and 68.5 MB in the end (delta: 41.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:55:00,660 INFO L168 Benchmark]: CACSL2BoogieTranslator took 319.04 ms. Allocated memory was 88.1 MB in the beginning and 113.2 MB in the end (delta: 25.2 MB). Free memory was 51.9 MB in the beginning and 89.4 MB in the end (delta: -37.5 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-11-09 10:55:00,661 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.53 ms. Allocated memory is still 113.2 MB. Free memory was 89.2 MB in the beginning and 87.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:55:00,661 INFO L168 Benchmark]: Boogie Preprocessor took 70.13 ms. Allocated memory is still 113.2 MB. Free memory was 87.8 MB in the beginning and 86.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 10:55:00,661 INFO L168 Benchmark]: RCFGBuilder took 387.03 ms. Allocated memory is still 113.2 MB. Free memory was 86.4 MB in the beginning and 76.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 10:55:00,662 INFO L168 Benchmark]: TraceAbstraction took 582244.44 ms. Allocated memory was 113.2 MB in the beginning and 885.0 MB in the end (delta: 771.8 MB). Free memory was 75.9 MB in the beginning and 338.0 MB in the end (delta: -262.0 MB). Peak memory consumption was 511.7 MB. Max. memory is 16.1 GB. [2021-11-09 10:55:00,663 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 88.1 MB. Free memory was 68.6 MB in the beginning and 68.5 MB in the end (delta: 41.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 319.04 ms. Allocated memory was 88.1 MB in the beginning and 113.2 MB in the end (delta: 25.2 MB). Free memory was 51.9 MB in the beginning and 89.4 MB in the end (delta: -37.5 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.53 ms. Allocated memory is still 113.2 MB. Free memory was 89.2 MB in the beginning and 87.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.13 ms. Allocated memory is still 113.2 MB. Free memory was 87.8 MB in the beginning and 86.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 387.03 ms. Allocated memory is still 113.2 MB. Free memory was 86.4 MB in the beginning and 76.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 582244.44 ms. Allocated memory was 113.2 MB in the beginning and 885.0 MB in the end (delta: 771.8 MB). Free memory was 75.9 MB in the beginning and 338.0 MB in the end (delta: -262.0 MB). Peak memory consumption was 511.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_tiling_tcpy.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5446997f7b2d7b76d63a39784df785fb06bbab562e365ba547eeee8a855e283e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:55:03,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:55:03,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:55:03,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:55:03,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:55:03,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:55:03,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:55:03,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:55:03,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:55:03,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:55:03,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:55:03,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:55:03,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:55:03,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:55:03,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:55:03,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:55:03,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:55:03,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:55:03,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:55:03,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:55:03,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:55:03,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:55:03,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:55:03,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:55:03,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:55:03,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:55:03,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:55:03,359 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:55:03,360 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:55:03,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:55:03,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:55:03,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:55:03,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:55:03,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:55:03,369 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:55:03,369 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:55:03,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:55:03,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:55:03,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:55:03,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:55:03,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:55:03,375 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-09 10:55:03,427 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:55:03,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:55:03,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:55:03,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:55:03,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:55:03,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:55:03,431 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:55:03,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:55:03,432 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:55:03,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:55:03,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:55:03,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:55:03,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:55:03,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:55:03,433 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-09 10:55:03,434 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-09 10:55:03,434 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:55:03,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:55:03,435 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:55:03,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:55:03,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:55:03,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:55:03,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:55:03,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:55:03,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:55:03,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:55:03,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:55:03,437 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-09 10:55:03,437 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-09 10:55:03,438 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:55:03,438 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:55:03,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:55:03,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:55:03,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-09 10:55:03,439 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5446997f7b2d7b76d63a39784df785fb06bbab562e365ba547eeee8a855e283e [2021-11-09 10:55:03,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:55:03,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:55:03,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:55:03,931 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:55:03,932 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:55:03,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-cav19/array_tiling_tcpy.c [2021-11-09 10:55:04,024 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/data/4906697e8/735588583821469a95574cded4dfadd1/FLAG5467f035b [2021-11-09 10:55:04,593 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:55:04,594 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/sv-benchmarks/c/array-cav19/array_tiling_tcpy.c [2021-11-09 10:55:04,606 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/data/4906697e8/735588583821469a95574cded4dfadd1/FLAG5467f035b [2021-11-09 10:55:04,967 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/data/4906697e8/735588583821469a95574cded4dfadd1 [2021-11-09 10:55:04,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:55:04,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:55:04,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:55:04,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:55:04,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:55:04,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:55:04" (1/1) ... [2021-11-09 10:55:04,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d796285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:04, skipping insertion in model container [2021-11-09 10:55:04,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:55:04" (1/1) ... [2021-11-09 10:55:04,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:55:05,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:55:05,234 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/sv-benchmarks/c/array-cav19/array_tiling_tcpy.c[408,421] [2021-11-09 10:55:05,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:55:05,283 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:55:05,304 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/sv-benchmarks/c/array-cav19/array_tiling_tcpy.c[408,421] [2021-11-09 10:55:05,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:55:05,392 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:55:05,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:05 WrapperNode [2021-11-09 10:55:05,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:55:05,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:55:05,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:55:05,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:55:05,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:05" (1/1) ... [2021-11-09 10:55:05,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:05" (1/1) ... [2021-11-09 10:55:05,458 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:55:05,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:55:05,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:55:05,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:55:05,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:05" (1/1) ... [2021-11-09 10:55:05,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:05" (1/1) ... [2021-11-09 10:55:05,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:05" (1/1) ... [2021-11-09 10:55:05,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:05" (1/1) ... [2021-11-09 10:55:05,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:05" (1/1) ... [2021-11-09 10:55:05,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:05" (1/1) ... [2021-11-09 10:55:05,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:05" (1/1) ... [2021-11-09 10:55:05,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:55:05,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:55:05,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:55:05,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:55:05,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:05" (1/1) ... [2021-11-09 10:55:05,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:55:05,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:55:05,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:55:05,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:55:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-09 10:55:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:55:05,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-09 10:55:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:55:05,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:55:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 10:55:05,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-09 10:55:06,078 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:55:06,094 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-09 10:55:06,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:55:06 BoogieIcfgContainer [2021-11-09 10:55:06,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:55:06,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:55:06,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:55:06,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:55:06,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:55:04" (1/3) ... [2021-11-09 10:55:06,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@311fd3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:55:06, skipping insertion in model container [2021-11-09 10:55:06,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:05" (2/3) ... [2021-11-09 10:55:06,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@311fd3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:55:06, skipping insertion in model container [2021-11-09 10:55:06,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:55:06" (3/3) ... [2021-11-09 10:55:06,107 INFO L111 eAbstractionObserver]: Analyzing ICFG array_tiling_tcpy.c [2021-11-09 10:55:06,124 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:55:06,124 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:55:06,212 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:55:06,220 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 10:55:06,221 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:55:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 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) [2021-11-09 10:55:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 10:55:06,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:55:06,244 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:55:06,245 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:55:06,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:55:06,252 INFO L85 PathProgramCache]: Analyzing trace with hash 333566837, now seen corresponding path program 1 times [2021-11-09 10:55:06,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:55:06,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123971014] [2021-11-09 10:55:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:55:06,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:55:06,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:55:06,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:55:06,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-09 10:55:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:55:06,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-09 10:55:06,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:55:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:55:06,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:55:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:55:06,622 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:55:06,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123971014] [2021-11-09 10:55:06,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123971014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:55:06,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:55:06,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 10:55:06,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895693025] [2021-11-09 10:55:06,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:55:06,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:55:06,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:55:06,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:55:06,653 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-11-09 10:55:06,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:55:06,671 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-11-09 10:55:06,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:55:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 [2021-11-09 10:55:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:55:06,682 INFO L225 Difference]: With dead ends: 35 [2021-11-09 10:55:06,683 INFO L226 Difference]: Without dead ends: 15 [2021-11-09 10:55:06,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:55:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-09 10:55:06,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-09 10:55:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:55:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-09 10:55:06,723 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-11-09 10:55:06,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:55:06,724 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-09 10:55:06,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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) [2021-11-09 10:55:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-09 10:55:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 10:55:06,726 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:55:06,726 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:55:06,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:55:06,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:55:06,941 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:55:06,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:55:06,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1506334727, now seen corresponding path program 1 times [2021-11-09 10:55:06,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:55:06,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939129028] [2021-11-09 10:55:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:55:06,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:55:06,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:55:06,957 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:55:06,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-09 10:55:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:55:07,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 10:55:07,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:55:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:55:07,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:55:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:55:07,603 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:55:07,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939129028] [2021-11-09 10:55:07,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939129028] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:55:07,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:55:07,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-11-09 10:55:07,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000909908] [2021-11-09 10:55:07,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:55:07,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:55:07,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:55:07,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:55:07,614 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:55:07,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:55:07,942 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-11-09 10:55:07,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:55:07,944 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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 11 [2021-11-09 10:55:07,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:55:07,945 INFO L225 Difference]: With dead ends: 37 [2021-11-09 10:55:07,945 INFO L226 Difference]: Without dead ends: 30 [2021-11-09 10:55:07,947 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:55:07,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-09 10:55:07,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2021-11-09 10:55:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:55:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-09 10:55:07,956 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2021-11-09 10:55:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:55:07,957 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-09 10:55:07,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:55:07,957 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-09 10:55:07,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 10:55:07,958 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:55:07,958 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:55:07,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:55:08,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:55:08,159 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:55:08,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:55:08,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1874528373, now seen corresponding path program 1 times [2021-11-09 10:55:08,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:55:08,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848129363] [2021-11-09 10:55:08,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:55:08,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:55:08,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:55:08,165 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:55:08,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c75f5483-b921-43e0-bbf9-4cc88da85a0a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-09 10:55:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:55:08,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 10:55:08,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:55:08,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:55:08,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:55:08,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:55:08,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:55:08,755 INFO L354 Elim1Store]: treesize reduction 46, result has 38.7 percent of original size [2021-11-09 10:55:08,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 57 [2021-11-09 10:55:09,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:55:09,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:55:09,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:55:09,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:55:09,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:55:09,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:55:09,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:55:09,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:55:09,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:55:09,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:55:09,452 INFO L354 Elim1Store]: treesize reduction 306, result has 18.0 percent of original size [2021-11-09 10:55:09,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 83 treesize of output 101 [2021-11-09 10:55:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:55:12,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:55:15,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:55:15,165 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 6303238 treesize of output 5811726 [2021-11-09 10:55:21,654 WARN L207 SmtUtils]: Spent 6.49 s on a formula simplification that was a NOOP. DAG size: 829 [2021-11-09 10:55:44,888 WARN L207 SmtUtils]: Spent 22.87 s on a formula simplification. DAG size of input: 833 DAG size of output: 833 [2021-11-09 10:56:05,370 WARN L207 SmtUtils]: Spent 5.12 s on a formula simplification. DAG size of input: 820 DAG size of output: 820 [2021-11-09 10:56:22,207 WARN L207 SmtUtils]: Spent 11.59 s on a formula simplification. DAG size of input: 820 DAG size of output: 820 [2021-11-09 10:56:28,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:56:28,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:56:28,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:56:28,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:56:28,960 INFO L354 Elim1Store]: treesize reduction 30, result has 72.0 percent of original size [2021-11-09 10:56:28,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 1395840 treesize of output 933452 [2021-11-09 10:56:30,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39893452 treesize of output 39679052