./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s3lif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s3lif.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ --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 3aac75742402b60de8e734a48b2dd5180b95add96e084901e84c53f880aa300a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:40:25,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:40:25,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:40:25,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:40:25,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:40:25,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:40:25,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:40:25,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:40:25,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:40:25,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:40:25,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:40:25,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:40:25,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:40:25,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:40:25,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:40:25,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:40:25,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:40:25,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:40:25,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:40:25,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:40:25,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:40:25,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:40:25,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:40:25,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:40:25,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:40:25,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:40:25,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:40:25,978 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:40:25,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:40:25,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:40:25,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:40:25,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:40:25,986 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:40:25,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:40:25,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:40:25,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:40:25,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:40:25,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:40:25,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:40:25,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:40:25,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:40:25,992 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:40:26,029 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:40:26,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:40:26,030 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:40:26,030 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:40:26,031 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:40:26,031 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:40:26,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:40:26,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:40:26,032 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:40:26,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:40:26,033 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:40:26,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:40:26,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:40:26,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:40:26,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:40:26,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:40:26,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:40:26,034 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:40:26,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:40:26,034 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:40:26,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:40:26,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:40:26,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:40:26,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:40:26,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:40:26,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:40:26,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:40:26,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:40:26,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:40:26,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:40:26,037 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:40:26,037 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:40:26,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:40:26,037 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_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3aac75742402b60de8e734a48b2dd5180b95add96e084901e84c53f880aa300a [2022-10-17 10:40:26,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:40:26,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:40:26,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:40:26,318 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:40:26,319 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:40:26,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/array-fpi/s3lif.c [2022-10-17 10:40:26,385 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/data/7885d960a/667d999ec9cc4cb0abbd20a8b954d8a7/FLAG5c86211b4 [2022-10-17 10:40:26,806 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:40:26,807 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/sv-benchmarks/c/array-fpi/s3lif.c [2022-10-17 10:40:26,813 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/data/7885d960a/667d999ec9cc4cb0abbd20a8b954d8a7/FLAG5c86211b4 [2022-10-17 10:40:27,217 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/data/7885d960a/667d999ec9cc4cb0abbd20a8b954d8a7 [2022-10-17 10:40:27,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:40:27,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:40:27,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:40:27,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:40:27,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:40:27,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:40:27" (1/1) ... [2022-10-17 10:40:27,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b938ed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:27, skipping insertion in model container [2022-10-17 10:40:27,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:40:27" (1/1) ... [2022-10-17 10:40:27,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:40:27,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:40:27,449 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_4193d38e-f1c2-4e61-803a-30fe591187d1/sv-benchmarks/c/array-fpi/s3lif.c[588,601] [2022-10-17 10:40:27,470 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:40:27,478 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:40:27,490 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_4193d38e-f1c2-4e61-803a-30fe591187d1/sv-benchmarks/c/array-fpi/s3lif.c[588,601] [2022-10-17 10:40:27,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:40:27,512 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:40:27,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:27 WrapperNode [2022-10-17 10:40:27,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:40:27,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:40:27,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:40:27,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:40:27,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:27" (1/1) ... [2022-10-17 10:40:27,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:27" (1/1) ... [2022-10-17 10:40:27,550 INFO L138 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2022-10-17 10:40:27,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:40:27,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:40:27,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:40:27,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:40:27,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:27" (1/1) ... [2022-10-17 10:40:27,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:27" (1/1) ... [2022-10-17 10:40:27,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:27" (1/1) ... [2022-10-17 10:40:27,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:27" (1/1) ... [2022-10-17 10:40:27,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:27" (1/1) ... [2022-10-17 10:40:27,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:27" (1/1) ... [2022-10-17 10:40:27,574 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:27" (1/1) ... [2022-10-17 10:40:27,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:27" (1/1) ... [2022-10-17 10:40:27,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:40:27,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:40:27,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:40:27,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:40:27,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:27" (1/1) ... [2022-10-17 10:40:27,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:40:27,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:27,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:40:27,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:40:27,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:40:27,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:40:27,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:40:27,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:40:27,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:40:27,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:40:27,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:40:27,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:40:27,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:40:27,732 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:40:27,735 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:40:27,988 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:40:27,994 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:40:27,994 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 10:40:27,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:40:27 BoogieIcfgContainer [2022-10-17 10:40:27,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:40:27,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:40:27,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:40:28,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:40:28,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:40:27" (1/3) ... [2022-10-17 10:40:28,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bacdf2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:40:28, skipping insertion in model container [2022-10-17 10:40:28,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:40:27" (2/3) ... [2022-10-17 10:40:28,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bacdf2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:40:28, skipping insertion in model container [2022-10-17 10:40:28,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:40:27" (3/3) ... [2022-10-17 10:40:28,032 INFO L112 eAbstractionObserver]: Analyzing ICFG s3lif.c [2022-10-17 10:40:28,053 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:40:28,068 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:40:28,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:40:28,152 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@330ab84a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:40:28,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:40:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 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) [2022-10-17 10:40:28,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 10:40:28,164 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:28,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:28,169 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:28,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:28,174 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2022-10-17 10:40:28,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:28,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754430114] [2022-10-17 10:40:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:28,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:40:28,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:28,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754430114] [2022-10-17 10:40:28,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754430114] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:40:28,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:40:28,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:40:28,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836723569] [2022-10-17 10:40:28,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:40:28,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:40:28,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:28,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:40:28,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:40:28,424 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:28,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:28,438 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-10-17 10:40:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:40:28,442 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-17 10:40:28,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:28,460 INFO L225 Difference]: With dead ends: 40 [2022-10-17 10:40:28,461 INFO L226 Difference]: Without dead ends: 18 [2022-10-17 10:40:28,463 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:40:28,467 INFO L413 NwaCegarLoop]: 26 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, 26 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 [2022-10-17 10:40:28,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:40:28,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-10-17 10:40:28,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-10-17 10:40:28,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-10-17 10:40:28,515 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2022-10-17 10:40:28,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:28,515 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-10-17 10:40:28,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-10-17 10:40:28,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 10:40:28,516 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:28,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:28,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:40:28,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:28,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:28,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2022-10-17 10:40:28,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:28,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018061128] [2022-10-17 10:40:28,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:28,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:40:28,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:28,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018061128] [2022-10-17 10:40:28,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018061128] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:40:28,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:40:28,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:40:28,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593322717] [2022-10-17 10:40:28,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:40:28,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:40:28,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:28,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:40:28,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:40:28,750 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:28,821 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-10-17 10:40:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:40:28,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-17 10:40:28,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:28,823 INFO L225 Difference]: With dead ends: 36 [2022-10-17 10:40:28,823 INFO L226 Difference]: Without dead ends: 25 [2022-10-17 10:40:28,823 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:40:28,825 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:28,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:40:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-10-17 10:40:28,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-10-17 10:40:28,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-10-17 10:40:28,833 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2022-10-17 10:40:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:28,834 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-10-17 10:40:28,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-10-17 10:40:28,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 10:40:28,836 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:28,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:28,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:40:28,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:28,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2022-10-17 10:40:28,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:28,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87516376] [2022-10-17 10:40:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:28,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:40:30,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:30,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87516376] [2022-10-17 10:40:30,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87516376] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:40:30,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182106804] [2022-10-17 10:40:30,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:30,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:30,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:30,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:30,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:40:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:30,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 38 conjunts are in the unsatisfiable core [2022-10-17 10:40:30,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:30,534 INFO L390 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 [2022-10-17 10:40:30,552 INFO L390 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 [2022-10-17 10:40:30,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 10:40:30,806 INFO L390 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 0 case distinctions, treesize of input 32 treesize of output 23 [2022-10-17 10:40:30,938 INFO L390 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 0 case distinctions, treesize of input 36 treesize of output 23 [2022-10-17 10:40:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:40:31,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:40:31,466 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:40:31,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 28 [2022-10-17 10:40:31,578 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:40:31,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-10-17 10:40:31,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 10:40:31,593 INFO L390 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 20 treesize of output 12 [2022-10-17 10:40:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:40:31,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182106804] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:40:31,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:40:31,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 28 [2022-10-17 10:40:31,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662042709] [2022-10-17 10:40:31,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:40:31,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-10-17 10:40:31,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:31,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-10-17 10:40:31,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2022-10-17 10:40:31,624 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 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) [2022-10-17 10:40:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:32,139 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2022-10-17 10:40:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-17 10:40:32,140 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 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 20 [2022-10-17 10:40:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:32,142 INFO L225 Difference]: With dead ends: 47 [2022-10-17 10:40:32,142 INFO L226 Difference]: Without dead ends: 43 [2022-10-17 10:40:32,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2022-10-17 10:40:32,144 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:32,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 60 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 202 Invalid, 0 Unknown, 21 Unchecked, 0.2s Time] [2022-10-17 10:40:32,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-10-17 10:40:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2022-10-17 10:40:32,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:32,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-10-17 10:40:32,166 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2022-10-17 10:40:32,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:32,167 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-10-17 10:40:32,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 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) [2022-10-17 10:40:32,168 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-10-17 10:40:32,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 10:40:32,169 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:32,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:32,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:40:32,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:32,397 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:32,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2022-10-17 10:40:32,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:32,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626561397] [2022-10-17 10:40:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:32,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:40:32,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:32,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626561397] [2022-10-17 10:40:32,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626561397] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:40:32,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698532962] [2022-10-17 10:40:32,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:32,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:32,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:32,701 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:32,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:40:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:32,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 10:40:32,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:32,804 INFO L390 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 18 treesize of output 14 [2022-10-17 10:40:32,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 10:40:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:40:32,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:40:32,869 INFO L390 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 14 treesize of output 12 [2022-10-17 10:40:32,882 INFO L390 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 18 treesize of output 16 [2022-10-17 10:40:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:40:32,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698532962] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:40:32,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:40:32,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-10-17 10:40:32,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463672832] [2022-10-17 10:40:32,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:40:32,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:40:32,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:32,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:40:32,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:40:32,901 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:32,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:32,990 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-10-17 10:40:32,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:40:32,990 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-17 10:40:32,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:32,994 INFO L225 Difference]: With dead ends: 48 [2022-10-17 10:40:32,994 INFO L226 Difference]: Without dead ends: 37 [2022-10-17 10:40:32,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:40:32,997 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:32,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 50 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:40:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-10-17 10:40:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-10-17 10:40:33,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:33,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-10-17 10:40:33,019 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 20 [2022-10-17 10:40:33,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:33,022 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-10-17 10:40:33,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:33,022 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-10-17 10:40:33,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 10:40:33,024 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:33,024 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:33,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:40:33,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:33,253 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:33,253 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2022-10-17 10:40:33,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:33,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478485581] [2022-10-17 10:40:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:33,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:40:33,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:33,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478485581] [2022-10-17 10:40:33,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478485581] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:40:33,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775216257] [2022-10-17 10:40:33,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:40:33,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:33,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:33,391 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:33,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:40:33,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:40:33,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:40:33,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:40:33,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:40:33,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:40:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:40:33,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775216257] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:40:33,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:40:33,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-10-17 10:40:33,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798861659] [2022-10-17 10:40:33,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:40:33,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:40:33,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:33,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:40:33,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:40:33,561 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:33,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:33,685 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2022-10-17 10:40:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:40:33,686 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-10-17 10:40:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:33,687 INFO L225 Difference]: With dead ends: 70 [2022-10-17 10:40:33,687 INFO L226 Difference]: Without dead ends: 44 [2022-10-17 10:40:33,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:40:33,691 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:33,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 30 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:40:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-17 10:40:33,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-10-17 10:40:33,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:33,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-10-17 10:40:33,706 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2022-10-17 10:40:33,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:33,709 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-10-17 10:40:33,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:33,710 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-10-17 10:40:33,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 10:40:33,711 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:33,711 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:33,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:40:33,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:33,931 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:33,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:33,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2022-10-17 10:40:33,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:33,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984844034] [2022-10-17 10:40:33,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:33,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:40:34,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:34,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984844034] [2022-10-17 10:40:34,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984844034] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:40:34,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168626268] [2022-10-17 10:40:34,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:40:34,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:34,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:34,041 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:34,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:40:34,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-17 10:40:34,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:40:34,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:40:34,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:40:34,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:40:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:40:34,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168626268] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:40:34,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:40:34,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-10-17 10:40:34,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451341503] [2022-10-17 10:40:34,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:40:34,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:40:34,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:34,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:40:34,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:40:34,219 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:34,346 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-10-17 10:40:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:40:34,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-10-17 10:40:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:34,349 INFO L225 Difference]: With dead ends: 39 [2022-10-17 10:40:34,349 INFO L226 Difference]: Without dead ends: 31 [2022-10-17 10:40:34,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:40:34,351 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:34,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 33 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:40:34,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-10-17 10:40:34,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-10-17 10:40:34,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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) [2022-10-17 10:40:34,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-10-17 10:40:34,366 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2022-10-17 10:40:34,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:34,366 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-10-17 10:40:34,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:34,367 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-10-17 10:40:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-17 10:40:34,368 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:34,369 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:34,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:40:34,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 10:40:34,589 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:34,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:34,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2022-10-17 10:40:34,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:34,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477241705] [2022-10-17 10:40:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:34,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:40:36,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:36,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477241705] [2022-10-17 10:40:36,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477241705] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:40:36,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712078736] [2022-10-17 10:40:36,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:40:36,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:36,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:36,888 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:36,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:40:36,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:40:36,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:40:36,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 54 conjunts are in the unsatisfiable core [2022-10-17 10:40:36,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:36,966 INFO L390 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 [2022-10-17 10:40:37,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:37,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 10:40:37,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:37,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 10:40:37,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:37,316 INFO L390 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 0 case distinctions, treesize of input 44 treesize of output 27 [2022-10-17 10:40:37,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:37,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:37,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-10-17 10:40:37,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 10:40:37,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:37,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:37,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2022-10-17 10:40:37,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:37,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-10-17 10:40:38,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:38,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2022-10-17 10:40:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:40:38,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:40:39,339 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:40:39,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 260 treesize of output 120 [2022-10-17 10:40:39,362 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (forall ((v_arrayElimArr_3 (Array Int Int))) (let ((.cse0 (select v_arrayElimArr_3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (not (= 4 .cse0)) (< (+ .cse1 3) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_3))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse0 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) .cse4))))) (not (= (select v_arrayElimArr_3 .cse5) 4))))) (forall ((v_arrayElimArr_3 (Array Int Int))) (let ((.cse6 (select v_arrayElimArr_3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (not (= 4 .cse6)) (< (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_3))) (let ((.cse8 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse9 (select .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse6 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) .cse9)))) (+ 5 .cse1)) (not (= (select v_arrayElimArr_3 .cse5) 4))))))) is different from false [2022-10-17 10:40:39,480 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (forall ((v_arrayElimArr_3 (Array Int Int))) (let ((.cse1 (select v_arrayElimArr_3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (< (+ 7 .cse0) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_3))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) .cse4))))) (not (= 4 .cse1)) (not (= (select v_arrayElimArr_3 .cse5) 4))))) (forall ((v_arrayElimArr_3 (Array Int Int))) (let ((.cse6 (select v_arrayElimArr_3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (< (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_3))) (let ((.cse8 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse9 (select .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse6 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) .cse9)))) (+ .cse0 9)) (not (= 4 .cse6)) (not (= (select v_arrayElimArr_3 .cse5) 4))))))) is different from false [2022-10-17 10:40:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-10-17 10:40:39,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712078736] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:40:39,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:40:39,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 51 [2022-10-17 10:40:39,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408992650] [2022-10-17 10:40:39,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:40:39,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-10-17 10:40:39,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:39,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-10-17 10:40:39,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=2023, Unknown=2, NotChecked=190, Total=2550 [2022-10-17 10:40:39,539 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:41,880 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 0) (<= (+ 2 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.base|) (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((v_arrayElimArr_3 (Array Int Int))) (let ((.cse1 (select v_arrayElimArr_3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (< (+ 7 .cse0) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_3))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) .cse4))))) (not (= 4 .cse1)) (not (= (select v_arrayElimArr_3 .cse5) 4))))) (forall ((v_arrayElimArr_3 (Array Int Int))) (let ((.cse6 (select v_arrayElimArr_3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (< (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_3))) (let ((.cse8 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse9 (select .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse6 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) .cse9)))) (+ .cse0 9)) (not (= 4 .cse6)) (not (= (select v_arrayElimArr_3 .cse5) 4))))) (let ((.cse15 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse10 (select .cse15 .cse5)) (.cse14 (select .cse15 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (not (= .cse10 1)) (= (* c_~N~0 4) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse15 |c_ULTIMATE.start_main_~a~0#1.offset| (+ 3 .cse14)) .cse5 (+ .cse10 3))))) (let ((.cse13 (select .cse12 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse11 (select .cse13 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse11 (select (select (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse13 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse11 3 .cse14))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) 3 .cse14))))) (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0) (not (= .cse14 1))))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0))) is different from false [2022-10-17 10:40:46,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:46,149 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2022-10-17 10:40:46,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-10-17 10:40:46,150 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-10-17 10:40:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:46,150 INFO L225 Difference]: With dead ends: 64 [2022-10-17 10:40:46,150 INFO L226 Difference]: Without dead ends: 60 [2022-10-17 10:40:46,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=537, Invalid=2894, Unknown=3, NotChecked=348, Total=3782 [2022-10-17 10:40:46,153 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:46,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 88 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 582 Invalid, 0 Unknown, 74 Unchecked, 1.5s Time] [2022-10-17 10:40:46,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-17 10:40:46,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2022-10-17 10:40:46,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:46,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-10-17 10:40:46,165 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 27 [2022-10-17 10:40:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:46,165 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-10-17 10:40:46,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:46,166 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-10-17 10:40:46,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-17 10:40:46,167 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:46,167 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:46,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:40:46,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:46,377 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:46,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:46,377 INFO L85 PathProgramCache]: Analyzing trace with hash -774428629, now seen corresponding path program 1 times [2022-10-17 10:40:46,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:46,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219431715] [2022-10-17 10:40:46,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:46,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:40:47,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:47,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219431715] [2022-10-17 10:40:47,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219431715] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:40:47,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390479301] [2022-10-17 10:40:47,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:47,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:47,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:47,038 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:47,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:40:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:47,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-17 10:40:47,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:47,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 10:40:47,304 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-10-17 10:40:47,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-10-17 10:40:47,383 INFO L390 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 19 treesize of output 7 [2022-10-17 10:40:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:40:47,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:40:47,567 INFO L390 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 16 treesize of output 14 [2022-10-17 10:40:47,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-17 10:40:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:40:47,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390479301] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:40:47,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:40:47,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 18 [2022-10-17 10:40:47,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287644755] [2022-10-17 10:40:47,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:40:47,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:40:47,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:47,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:40:47,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:40:47,618 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:48,403 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-10-17 10:40:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:40:48,404 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-10-17 10:40:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:48,405 INFO L225 Difference]: With dead ends: 62 [2022-10-17 10:40:48,405 INFO L226 Difference]: Without dead ends: 49 [2022-10-17 10:40:48,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-10-17 10:40:48,406 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:48,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 52 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:40:48,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-17 10:40:48,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2022-10-17 10:40:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-10-17 10:40:48,419 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 27 [2022-10-17 10:40:48,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:48,419 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-10-17 10:40:48,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:48,419 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-10-17 10:40:48,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-17 10:40:48,420 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:48,421 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:48,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:40:48,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:48,649 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:48,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:48,649 INFO L85 PathProgramCache]: Analyzing trace with hash -132219249, now seen corresponding path program 5 times [2022-10-17 10:40:48,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:48,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910710531] [2022-10-17 10:40:48,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:48,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:40:48,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:48,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910710531] [2022-10-17 10:40:48,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910710531] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:40:48,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315541293] [2022-10-17 10:40:48,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-17 10:40:48,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:48,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:48,868 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:48,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:40:48,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-10-17 10:40:48,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:40:48,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:40:48,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:40:49,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:40:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:40:49,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315541293] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:40:49,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:40:49,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-10-17 10:40:49,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612429793] [2022-10-17 10:40:49,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:40:49,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:40:49,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:40:49,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:40:49,354 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:49,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:49,754 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2022-10-17 10:40:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:40:49,755 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-10-17 10:40:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:49,755 INFO L225 Difference]: With dead ends: 86 [2022-10-17 10:40:49,756 INFO L226 Difference]: Without dead ends: 53 [2022-10-17 10:40:49,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:40:49,757 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 79 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:49,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 30 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:40:49,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-10-17 10:40:49,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2022-10-17 10:40:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:49,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-10-17 10:40:49,771 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 29 [2022-10-17 10:40:49,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:49,771 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-10-17 10:40:49,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-10-17 10:40:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-17 10:40:49,773 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:49,773 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:49,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:40:49,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-10-17 10:40:49,997 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:49,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:49,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1292373713, now seen corresponding path program 6 times [2022-10-17 10:40:49,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:49,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713095733] [2022-10-17 10:40:49,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:49,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:40:50,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:50,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713095733] [2022-10-17 10:40:50,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713095733] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:40:50,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398651597] [2022-10-17 10:40:50,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-17 10:40:50,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:50,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:50,257 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:50,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:40:50,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-10-17 10:40:50,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:40:50,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:40:50,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:40:50,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:40:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:40:50,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398651597] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:40:50,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:40:50,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-10-17 10:40:50,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291758452] [2022-10-17 10:40:50,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:40:50,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:40:50,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:40:50,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:40:50,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:40:50,814 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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) [2022-10-17 10:40:51,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:40:51,374 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-10-17 10:40:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:40:51,375 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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 29 [2022-10-17 10:40:51,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:40:51,375 INFO L225 Difference]: With dead ends: 48 [2022-10-17 10:40:51,375 INFO L226 Difference]: Without dead ends: 38 [2022-10-17 10:40:51,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-10-17 10:40:51,377 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 61 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:40:51,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 27 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:40:51,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-17 10:40:51,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-10-17 10:40:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:40:51,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-10-17 10:40:51,391 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2022-10-17 10:40:51,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:40:51,392 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-10-17 10:40:51,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 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) [2022-10-17 10:40:51,392 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-10-17 10:40:51,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 10:40:51,397 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:40:51,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:40:51,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 10:40:51,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 10:40:51,625 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:40:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:40:51,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 7 times [2022-10-17 10:40:51,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:40:51,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006014159] [2022-10-17 10:40:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:40:51,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:40:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:40:56,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:40:56,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006014159] [2022-10-17 10:40:56,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006014159] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:40:56,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493626054] [2022-10-17 10:40:56,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-17 10:40:56,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:40:56,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:40:56,141 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:40:56,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4193d38e-f1c2-4e61-803a-30fe591187d1/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 10:40:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:40:56,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 77 conjunts are in the unsatisfiable core [2022-10-17 10:40:56,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:40:56,274 INFO L390 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 [2022-10-17 10:40:56,286 INFO L390 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 [2022-10-17 10:40:56,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 10:40:56,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 10:40:56,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 10:40:57,205 INFO L390 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 0 case distinctions, treesize of input 44 treesize of output 27 [2022-10-17 10:40:57,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:57,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2022-10-17 10:40:58,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:58,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:58,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2022-10-17 10:40:58,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 10:40:58,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:58,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:58,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-10-17 10:40:58,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:58,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:58,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:40:58,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 10:40:58,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 49 [2022-10-17 10:40:59,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 43 [2022-10-17 10:40:59,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 35 [2022-10-17 10:40:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:40:59,554 INFO L328 TraceCheckSpWp]: Computing backward predicates...