./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF --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 c28ec531d32a995842654b11d319d79f5f6e1bd0d3e33d9bd3cc173d0787760c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:54:04,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:54:04,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:54:04,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:54:04,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:54:04,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:54:04,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:54:04,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:54:04,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:54:04,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:54:04,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:54:04,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:54:04,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:54:04,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:54:04,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:54:04,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:54:04,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:54:04,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:54:04,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:54:04,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:54:04,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:54:04,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:54:04,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:54:04,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:54:05,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:54:05,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:54:05,006 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:54:05,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:54:05,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:54:05,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:54:05,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:54:05,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:54:05,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:54:05,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:54:05,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:54:05,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:54:05,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:54:05,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:54:05,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:54:05,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:54:05,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:54:05,025 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:54:05,073 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:54:05,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:54:05,077 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:54:05,086 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:54:05,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:54:05,088 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:54:05,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:54:05,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:54:05,089 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:54:05,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:54:05,091 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:54:05,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:54:05,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:54:05,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:54:05,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:54:05,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:54:05,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:54:05,093 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:54:05,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:54:05,094 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:54:05,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:54:05,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:54:05,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:54:05,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:54:05,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:54:05,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:54:05,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:54:05,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:54:05,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:54:05,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:54:05,098 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:54:05,099 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:54:05,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:54:05,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:54:05,100 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_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c28ec531d32a995842654b11d319d79f5f6e1bd0d3e33d9bd3cc173d0787760c [2021-11-20 05:54:05,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:54:05,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:54:05,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:54:05,453 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:54:05,454 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:54:05,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-fpi/ifeqn3.c [2021-11-20 05:54:05,540 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/data/1cd04d9d2/4e50683665eb463eb7b8b05791ce2e2a/FLAG2073ee5f7 [2021-11-20 05:54:06,133 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:54:06,134 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/sv-benchmarks/c/array-fpi/ifeqn3.c [2021-11-20 05:54:06,141 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/data/1cd04d9d2/4e50683665eb463eb7b8b05791ce2e2a/FLAG2073ee5f7 [2021-11-20 05:54:06,497 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/data/1cd04d9d2/4e50683665eb463eb7b8b05791ce2e2a [2021-11-20 05:54:06,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:54:06,503 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:54:06,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:54:06,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:54:06,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:54:06,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:54:06" (1/1) ... [2021-11-20 05:54:06,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dbb2f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:06, skipping insertion in model container [2021-11-20 05:54:06,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:54:06" (1/1) ... [2021-11-20 05:54:06,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:54:06,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:54:06,782 WARN L230 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_57e2f386-3d39-4789-9cfd-9e0daea064c5/sv-benchmarks/c/array-fpi/ifeqn3.c[589,602] [2021-11-20 05:54:06,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:54:06,827 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:54:06,848 WARN L230 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_57e2f386-3d39-4789-9cfd-9e0daea064c5/sv-benchmarks/c/array-fpi/ifeqn3.c[589,602] [2021-11-20 05:54:06,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:54:06,888 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:54:06,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:06 WrapperNode [2021-11-20 05:54:06,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:54:06,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:54:06,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:54:06,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:54:06,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:06" (1/1) ... [2021-11-20 05:54:06,908 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:06" (1/1) ... [2021-11-20 05:54:06,936 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-11-20 05:54:06,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:54:06,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:54:06,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:54:06,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:54:06,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:06" (1/1) ... [2021-11-20 05:54:06,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:06" (1/1) ... [2021-11-20 05:54:06,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:06" (1/1) ... [2021-11-20 05:54:06,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:06" (1/1) ... [2021-11-20 05:54:06,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:06" (1/1) ... [2021-11-20 05:54:06,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:06" (1/1) ... [2021-11-20 05:54:06,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:06" (1/1) ... [2021-11-20 05:54:06,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:54:06,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:54:06,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:54:06,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:54:06,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:06" (1/1) ... [2021-11-20 05:54:07,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:54:07,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:54:07,048 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:54:07,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:54:07,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:54:07,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:54:07,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:54:07,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:54:07,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:54:07,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:54:07,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:54:07,220 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:54:07,222 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:54:07,497 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:54:07,507 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:54:07,508 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 05:54:07,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:54:07 BoogieIcfgContainer [2021-11-20 05:54:07,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:54:07,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:54:07,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:54:07,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:54:07,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:54:06" (1/3) ... [2021-11-20 05:54:07,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c73e83f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:54:07, skipping insertion in model container [2021-11-20 05:54:07,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:54:06" (2/3) ... [2021-11-20 05:54:07,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c73e83f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:54:07, skipping insertion in model container [2021-11-20 05:54:07,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:54:07" (3/3) ... [2021-11-20 05:54:07,536 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn3.c [2021-11-20 05:54:07,543 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:54:07,543 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:54:07,612 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:54:07,621 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 [2021-11-20 05:54:07,622 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:54:07,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 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) [2021-11-20 05:54:07,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 05:54:07,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:07,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:07,647 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:07,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:07,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2021-11-20 05:54:07,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:07,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89949707] [2021-11-20 05:54:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:07,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:54:07,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:07,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89949707] [2021-11-20 05:54:07,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89949707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:07,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:07,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:54:07,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068129353] [2021-11-20 05:54:07,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:07,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:54:07,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:07,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:54:07,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:54:07,933 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:07,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:07,958 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-11-20 05:54:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:54:07,961 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 05:54:07,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:07,972 INFO L225 Difference]: With dead ends: 42 [2021-11-20 05:54:07,972 INFO L226 Difference]: Without dead ends: 19 [2021-11-20 05:54:07,976 INFO L932 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 [2021-11-20 05:54:07,983 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:07,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:54:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-20 05:54:08,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-20 05:54:08,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:08,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-20 05:54:08,024 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-11-20 05:54:08,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:08,025 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-20 05:54:08,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-20 05:54:08,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 05:54:08,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:08,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:08,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:54:08,027 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:08,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:08,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-11-20 05:54:08,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:08,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035501898] [2021-11-20 05:54:08,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:08,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:54:08,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:08,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035501898] [2021-11-20 05:54:08,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035501898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:08,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:08,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:54:08,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133454889] [2021-11-20 05:54:08,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:08,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:54:08,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:08,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:54:08,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:08,151 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:08,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:08,241 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-11-20 05:54:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:54:08,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 05:54:08,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:08,244 INFO L225 Difference]: With dead ends: 45 [2021-11-20 05:54:08,244 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 05:54:08,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:54:08,247 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:08,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:54:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 05:54:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-11-20 05:54:08,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-20 05:54:08,256 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-11-20 05:54:08,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:08,257 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-20 05:54:08,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:08,257 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-20 05:54:08,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 05:54:08,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:08,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:08,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:54:08,259 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-11-20 05:54:08,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:08,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524405903] [2021-11-20 05:54:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:08,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:08,287 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:54:08,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466283284] [2021-11-20 05:54:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:08,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:08,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:54:08,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:54:08,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:54:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:08,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:54:08,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:08,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 05:54:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:54:08,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:54:08,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:08,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524405903] [2021-11-20 05:54:08,738 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:54:08,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466283284] [2021-11-20 05:54:08,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466283284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:54:08,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:54:08,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:54:08,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43000001] [2021-11-20 05:54:08,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:54:08,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:54:08,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:08,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:54:08,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:54:08,742 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:08,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:08,832 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-11-20 05:54:08,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:54:08,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 05:54:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:08,834 INFO L225 Difference]: With dead ends: 40 [2021-11-20 05:54:08,834 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 05:54:08,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:54:08,837 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:08,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:54:08,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 05:54:08,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-11-20 05:54:08,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) [2021-11-20 05:54:08,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-20 05:54:08,847 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-11-20 05:54:08,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:08,848 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-20 05:54:08,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:08,848 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-20 05:54:08,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 05:54:08,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:08,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:08,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:54:09,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:09,063 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:09,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:09,064 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2021-11-20 05:54:09,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:09,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955436706] [2021-11-20 05:54:09,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:09,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:09,121 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:54:09,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198343094] [2021-11-20 05:54:09,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:09,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:09,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:54:09,125 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:54:09,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:54:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:09,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:54:09,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:54:09,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:54:09,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:09,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955436706] [2021-11-20 05:54:09,598 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:54:09,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198343094] [2021-11-20 05:54:09,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198343094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:54:09,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:54:09,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 05:54:09,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096462671] [2021-11-20 05:54:09,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:54:09,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:54:09,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:09,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:54:09,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:54:09,611 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:09,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:09,859 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-11-20 05:54:09,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:54:09,859 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 05:54:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:09,861 INFO L225 Difference]: With dead ends: 70 [2021-11-20 05:54:09,861 INFO L226 Difference]: Without dead ends: 43 [2021-11-20 05:54:09,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:54:09,863 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:09,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:54:09,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-20 05:54:09,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2021-11-20 05:54:09,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:09,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-20 05:54:09,872 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2021-11-20 05:54:09,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:09,872 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-20 05:54:09,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:09,873 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-20 05:54:09,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 05:54:09,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:09,874 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:09,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:54:10,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:10,090 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:10,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:10,091 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2021-11-20 05:54:10,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:10,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705430055] [2021-11-20 05:54:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:10,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:10,121 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:54:10,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926587158] [2021-11-20 05:54:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:10,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:10,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:54:10,123 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:54:10,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:54:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:10,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 05:54:10,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:10,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 05:54:10,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:10,538 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-20 05:54:10,539 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 31 treesize of output 39 [2021-11-20 05:54:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:54:10,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:15,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:54:15,589 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 117 treesize of output 115 [2021-11-20 05:54:15,732 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 42 treesize of output 33 [2021-11-20 05:54:15,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:54:15,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 289 treesize of output 266 [2021-11-20 05:54:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:54:15,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:15,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705430055] [2021-11-20 05:54:15,958 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:54:15,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926587158] [2021-11-20 05:54:15,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926587158] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:54:15,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:54:15,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-20 05:54:15,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027885377] [2021-11-20 05:54:15,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:54:15,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 05:54:15,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:15,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 05:54:15,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=112, Unknown=2, NotChecked=0, Total=156 [2021-11-20 05:54:15,961 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:16,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:16,180 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2021-11-20 05:54:16,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:54:16,181 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 24 [2021-11-20 05:54:16,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:16,182 INFO L225 Difference]: With dead ends: 50 [2021-11-20 05:54:16,182 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 05:54:16,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=59, Invalid=149, Unknown=2, NotChecked=0, Total=210 [2021-11-20 05:54:16,184 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:16,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 65 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2021-11-20 05:54:16,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 05:54:16,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-11-20 05:54:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-11-20 05:54:16,192 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 24 [2021-11-20 05:54:16,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:16,193 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-11-20 05:54:16,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-11-20 05:54:16,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 05:54:16,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:16,195 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:16,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:54:16,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:16,395 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:16,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:16,396 INFO L85 PathProgramCache]: Analyzing trace with hash -672376363, now seen corresponding path program 2 times [2021-11-20 05:54:16,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:16,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826673778] [2021-11-20 05:54:16,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:16,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:16,436 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:54:16,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306527859] [2021-11-20 05:54:16,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:54:16,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:16,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:54:16,451 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:54:16,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:54:16,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:54:16,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:54:16,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:54:16,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:54:16,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:54:16,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:16,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826673778] [2021-11-20 05:54:16,765 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:54:16,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306527859] [2021-11-20 05:54:16,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306527859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:54:16,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:54:16,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 05:54:16,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959714235] [2021-11-20 05:54:16,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:54:16,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:54:16,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:16,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:54:16,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:54:16,769 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:17,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:17,020 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2021-11-20 05:54:17,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:54:17,021 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-20 05:54:17,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:17,023 INFO L225 Difference]: With dead ends: 98 [2021-11-20 05:54:17,024 INFO L226 Difference]: Without dead ends: 83 [2021-11-20 05:54:17,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:54:17,025 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 86 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:17,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 66 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:54:17,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-20 05:54:17,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2021-11-20 05:54:17,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-11-20 05:54:17,052 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2021-11-20 05:54:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:17,052 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-11-20 05:54:17,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:17,053 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-11-20 05:54:17,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 05:54:17,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:17,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:17,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:54:17,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:17,280 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:17,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:17,280 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2021-11-20 05:54:17,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:17,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558499885] [2021-11-20 05:54:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:17,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:17,310 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:54:17,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593403062] [2021-11-20 05:54:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:17,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:17,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:54:17,327 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:54:17,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:54:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:17,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 05:54:17,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:17,476 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 [2021-11-20 05:54:17,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 05:54:17,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:17,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-11-20 05:54:17,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:17,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 05:54:17,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:17,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:17,964 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 05:54:17,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 42 [2021-11-20 05:54:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:54:18,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:19,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2021-11-20 05:54:19,493 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 69 treesize of output 60 [2021-11-20 05:54:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:54:19,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:54:19,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558499885] [2021-11-20 05:54:19,590 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:54:19,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593403062] [2021-11-20 05:54:19,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593403062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:54:19,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:54:19,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-20 05:54:19,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491973313] [2021-11-20 05:54:19,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:54:19,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 05:54:19,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:54:19,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 05:54:19,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-11-20 05:54:19,594 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:26,156 INFO L93 Difference]: Finished difference Result 210 states and 248 transitions. [2021-11-20 05:54:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 05:54:26,158 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 28 [2021-11-20 05:54:26,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:26,160 INFO L225 Difference]: With dead ends: 210 [2021-11-20 05:54:26,160 INFO L226 Difference]: Without dead ends: 143 [2021-11-20 05:54:26,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=388, Invalid=1334, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 05:54:26,163 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 185 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:26,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 196 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 332 Invalid, 0 Unknown, 59 Unchecked, 1.8s Time] [2021-11-20 05:54:26,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-20 05:54:26,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 89. [2021-11-20 05:54:26,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 88 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) [2021-11-20 05:54:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2021-11-20 05:54:26,180 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 28 [2021-11-20 05:54:26,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:26,180 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2021-11-20 05:54:26,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:54:26,181 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2021-11-20 05:54:26,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 05:54:26,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:26,182 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:54:26,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:54:26,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:26,402 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:54:26,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:26,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1487245307, now seen corresponding path program 3 times [2021-11-20 05:54:26,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:54:26,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214697810] [2021-11-20 05:54:26,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:26,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:54:26,457 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:54:26,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665108352] [2021-11-20 05:54:26,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:54:26,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:54:26,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:54:26,477 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:54:26,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:54:26,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 05:54:26,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:54:26,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 05:54:26,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:54:27,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 05:54:27,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:27,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:27,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:27,430 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-20 05:54:27,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 229 treesize of output 397 [2021-11-20 05:54:27,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:27,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:27,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:27,609 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 05:54:27,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 291 treesize of output 187 [2021-11-20 05:54:27,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:27,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:27,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:27,743 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 05:54:27,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 195 treesize of output 104 [2021-11-20 05:54:27,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:27,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:27,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:27,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:27,797 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 05:54:27,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 171 treesize of output 102 [2021-11-20 05:54:28,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:28,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:28,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:28,160 INFO L354 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2021-11-20 05:54:28,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 242 treesize of output 454 [2021-11-20 05:54:28,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:28,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:28,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:28,331 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 05:54:28,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 381 treesize of output 237 [2021-11-20 05:54:28,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 05:54:28,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:28,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:28,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:28,638 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 05:54:28,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 385 treesize of output 240 [2021-11-20 05:54:28,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:28,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:28,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:54:28,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:54:28,787 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 05:54:28,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 228 treesize of output 105 [2021-11-20 05:54:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 05:54:29,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:04,425 WARN L227 SmtUtils]: Spent 31.51s on a formula simplification. DAG size of input: 93 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:55:11,025 WARN L227 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:55:11,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:55:11,099 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 1860 treesize of output 1732 [2021-11-20 05:55:11,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:11,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 820 treesize of output 726 [2021-11-20 05:55:11,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:11,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:11,205 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 566 treesize of output 494 [2021-11-20 05:55:11,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:11,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:11,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:11,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:11,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:11,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:11,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 827 treesize of output 634 [2021-11-20 05:55:11,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:11,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:11,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:11,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1034 treesize of output 900 [2021-11-20 05:55:11,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:11,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:11,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:11,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 820 treesize of output 726 [2021-11-20 05:55:11,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:11,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:11,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:55:11,725 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 1208 treesize of output 1120 [2021-11-20 05:55:11,794 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-20 05:55:11,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 220 [2021-11-20 05:55:11,819 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-20 05:55:11,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2743 treesize of output 2440 [2021-11-20 05:55:12,020 INFO L354 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2021-11-20 05:55:12,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 494 treesize of output 1 [2021-11-20 05:55:12,103 INFO L354 Elim1Store]: treesize reduction 144, result has 0.7 percent of original size [2021-11-20 05:55:12,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 16528 treesize of output 1 [2021-11-20 05:55:12,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:12,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 220 [2021-11-20 05:55:12,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:12,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:12,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:12,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:12,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:12,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:14,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 05:55:14,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:14,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214697810] [2021-11-20 05:55:14,396 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:14,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665108352] [2021-11-20 05:55:14,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665108352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:55:14,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:14,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 29 [2021-11-20 05:55:14,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788791790] [2021-11-20 05:55:14,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:55:14,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 05:55:14,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:14,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 05:55:14,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=636, Unknown=2, NotChecked=0, Total=812 [2021-11-20 05:55:14,399 INFO L87 Difference]: Start difference. First operand 89 states and 109 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:23,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:23,136 INFO L93 Difference]: Finished difference Result 185 states and 234 transitions. [2021-11-20 05:55:23,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 05:55:23,137 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 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 30 [2021-11-20 05:55:23,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:23,139 INFO L225 Difference]: With dead ends: 185 [2021-11-20 05:55:23,139 INFO L226 Difference]: Without dead ends: 145 [2021-11-20 05:55:23,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 51.8s TimeCoverageRelationStatistics Valid=486, Invalid=1863, Unknown=3, NotChecked=0, Total=2352 [2021-11-20 05:55:23,142 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:23,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 54 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 161 Invalid, 0 Unknown, 112 Unchecked, 0.4s Time] [2021-11-20 05:55:23,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-20 05:55:23,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 129. [2021-11-20 05:55:23,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.2734375) internal successors, (163), 128 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:23,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 163 transitions. [2021-11-20 05:55:23,175 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 163 transitions. Word has length 30 [2021-11-20 05:55:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:23,176 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 163 transitions. [2021-11-20 05:55:23,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:23,176 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 163 transitions. [2021-11-20 05:55:23,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:55:23,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:23,179 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:23,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:23,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 05:55:23,385 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:23,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:23,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1708848056, now seen corresponding path program 2 times [2021-11-20 05:55:23,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:23,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936828427] [2021-11-20 05:55:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:23,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:23,422 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:23,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345322317] [2021-11-20 05:55:23,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:55:23,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:23,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:23,424 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:23,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:55:23,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:55:23,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:55:23,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:55:23,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:55:23,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:55:23,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:23,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936828427] [2021-11-20 05:55:23,832 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:23,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345322317] [2021-11-20 05:55:23,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345322317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:55:23,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:23,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-20 05:55:23,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138636974] [2021-11-20 05:55:23,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:55:23,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 05:55:23,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:23,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 05:55:23,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:55:23,835 INFO L87 Difference]: Start difference. First operand 129 states and 163 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:24,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:24,243 INFO L93 Difference]: Finished difference Result 291 states and 357 transitions. [2021-11-20 05:55:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:55:24,244 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 37 [2021-11-20 05:55:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:24,246 INFO L225 Difference]: With dead ends: 291 [2021-11-20 05:55:24,246 INFO L226 Difference]: Without dead ends: 219 [2021-11-20 05:55:24,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2021-11-20 05:55:24,248 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 147 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:24,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 110 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:55:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-20 05:55:24,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 168. [2021-11-20 05:55:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.2574850299401197) internal successors, (210), 167 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 210 transitions. [2021-11-20 05:55:24,284 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 210 transitions. Word has length 37 [2021-11-20 05:55:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:24,285 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 210 transitions. [2021-11-20 05:55:24,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:24,285 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 210 transitions. [2021-11-20 05:55:24,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:55:24,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:24,296 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:24,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:24,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:24,510 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:24,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:24,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1173959464, now seen corresponding path program 3 times [2021-11-20 05:55:24,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:24,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640369244] [2021-11-20 05:55:24,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:24,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:24,553 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:24,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221964612] [2021-11-20 05:55:24,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:55:24,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:24,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:24,560 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:24,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:55:24,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 05:55:24,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:55:24,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:55:24,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:55:25,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 05:55:25,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:25,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640369244] [2021-11-20 05:55:25,350 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:25,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221964612] [2021-11-20 05:55:25,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221964612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:55:25,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:25,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-11-20 05:55:25,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704551150] [2021-11-20 05:55:25,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:55:25,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 05:55:25,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:25,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 05:55:25,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:55:25,352 INFO L87 Difference]: Start difference. First operand 168 states and 210 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:26,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:26,358 INFO L93 Difference]: Finished difference Result 211 states and 251 transitions. [2021-11-20 05:55:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 05:55:26,359 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-20 05:55:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:26,361 INFO L225 Difference]: With dead ends: 211 [2021-11-20 05:55:26,362 INFO L226 Difference]: Without dead ends: 202 [2021-11-20 05:55:26,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=450, Invalid=1530, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 05:55:26,365 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 149 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:26,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 127 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:55:26,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-20 05:55:26,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 168. [2021-11-20 05:55:26,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.2455089820359282) internal successors, (208), 167 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:26,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2021-11-20 05:55:26,401 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 37 [2021-11-20 05:55:26,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:26,404 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2021-11-20 05:55:26,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2021-11-20 05:55:26,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 05:55:26,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:26,406 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:26,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:26,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 05:55:26,626 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:26,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:26,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 4 times [2021-11-20 05:55:26,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:26,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928316391] [2021-11-20 05:55:26,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:26,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:26,690 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:26,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418959015] [2021-11-20 05:55:26,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:55:26,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:26,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:26,694 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:26,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57e2f386-3d39-4789-9cfd-9e0daea064c5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:55:27,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:55:27,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:55:27,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 05:55:27,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:27,159 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 [2021-11-20 05:55:27,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 05:55:27,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:27,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 245 [2021-11-20 05:55:27,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 45 [2021-11-20 05:55:27,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 05:55:27,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 50 [2021-11-20 05:55:27,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 37 [2021-11-20 05:55:27,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2021-11-20 05:55:27,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-20 05:55:27,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:27,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:27,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:28,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:28,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:28,072 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-11-20 05:55:28,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 30 case distinctions, treesize of input 254 treesize of output 506 [2021-11-20 05:55:28,158 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 05:55:28,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:28,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:28,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 134 [2021-11-20 05:55:28,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:28,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:28,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 172 [2021-11-20 05:55:28,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:28,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:28,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:28,442 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 05:55:28,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 238 treesize of output 134 [2021-11-20 05:55:28,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:28,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 05:55:28,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:55:28,692 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-20 05:55:28,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 69 treesize of output 66 [2021-11-20 05:55:29,351 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-20 05:55:29,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 92 treesize of output 48 [2021-11-20 05:55:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:55:29,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:40,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25264 treesize of output 24192 [2021-11-20 05:55:41,755 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 05:55:41,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 10954 treesize of output 8942 [2021-11-20 05:55:51,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 427362 treesize of output 410210 [2021-11-20 05:55:52,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:55:52,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 472802 treesize of output 405490 [2021-11-20 05:56:14,550 WARN L227 SmtUtils]: Spent 21.59s on a formula simplification. DAG size of input: 593 DAG size of output: 591 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)