./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN --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 3340815bef7e21ae2d4803d7059577c1761bb3b7b4bb24b2b34d5d0d0054fd10 --- 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-6b4ec56 [2022-11-20 12:44:35,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:44:35,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:44:35,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:44:35,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:44:35,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:44:35,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:44:35,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:44:35,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:44:35,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:44:35,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:44:35,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:44:35,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:44:35,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:44:35,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:44:35,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:44:35,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:44:35,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:44:35,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:44:35,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:44:35,472 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:44:35,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:44:35,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:44:35,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:44:35,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:44:35,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:44:35,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:44:35,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:44:35,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:44:35,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:44:35,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:44:35,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:44:35,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:44:35,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:44:35,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:44:35,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:44:35,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:44:35,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:44:35,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:44:35,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:44:35,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:44:35,514 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:44:35,566 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:44:35,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:44:35,567 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:44:35,568 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:44:35,569 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:44:35,569 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:44:35,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:44:35,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:44:35,571 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:44:35,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:44:35,573 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:44:35,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:44:35,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:44:35,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:44:35,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:44:35,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:44:35,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:44:35,575 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:44:35,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:44:35,575 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:44:35,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:44:35,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:44:35,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:44:35,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:44:35,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:44:35,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:44:35,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:44:35,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:44:35,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:44:35,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:44:35,580 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:44:35,580 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:44:35,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:44:35,581 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_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3340815bef7e21ae2d4803d7059577c1761bb3b7b4bb24b2b34d5d0d0054fd10 [2022-11-20 12:44:35,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:44:35,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:44:35,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:44:35,954 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:44:35,955 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:44:35,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i [2022-11-20 12:44:39,703 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:44:39,997 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:44:40,001 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i [2022-11-20 12:44:40,018 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/data/e586a8612/276258986d314bc4a254d2f2b60168e6/FLAG022edc9c2 [2022-11-20 12:44:40,036 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/data/e586a8612/276258986d314bc4a254d2f2b60168e6 [2022-11-20 12:44:40,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:44:40,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:44:40,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:44:40,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:44:40,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:44:40,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:44:40" (1/1) ... [2022-11-20 12:44:40,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53bbc337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:40, skipping insertion in model container [2022-11-20 12:44:40,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:44:40" (1/1) ... [2022-11-20 12:44:40,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:44:40,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:44:40,525 WARN L237 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_3163996e-cbd6-43ee-868d-73975c3a71f3/sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i[24151,24164] [2022-11-20 12:44:40,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:44:40,550 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:44:40,639 WARN L237 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_3163996e-cbd6-43ee-868d-73975c3a71f3/sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i[24151,24164] [2022-11-20 12:44:40,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:44:40,682 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:44:40,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:40 WrapperNode [2022-11-20 12:44:40,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:44:40,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:44:40,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:44:40,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:44:40,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:40" (1/1) ... [2022-11-20 12:44:40,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:40" (1/1) ... [2022-11-20 12:44:40,773 INFO L138 Inliner]: procedures = 126, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 119 [2022-11-20 12:44:40,774 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:44:40,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:44:40,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:44:40,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:44:40,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:40" (1/1) ... [2022-11-20 12:44:40,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:40" (1/1) ... [2022-11-20 12:44:40,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:40" (1/1) ... [2022-11-20 12:44:40,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:40" (1/1) ... [2022-11-20 12:44:40,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:40" (1/1) ... [2022-11-20 12:44:40,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:40" (1/1) ... [2022-11-20 12:44:40,809 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:40" (1/1) ... [2022-11-20 12:44:40,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:40" (1/1) ... [2022-11-20 12:44:40,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:44:40,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:44:40,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:44:40,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:44:40,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:40" (1/1) ... [2022-11-20 12:44:40,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:44:40,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:40,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:44:40,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:44:40,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:44:40,936 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-20 12:44:40,936 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-20 12:44:40,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 12:44:40,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:44:40,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:44:40,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 12:44:40,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 12:44:40,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:44:40,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 12:44:40,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:44:40,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:44:40,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:44:41,185 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:44:41,188 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:44:41,608 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:44:41,631 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:44:41,631 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 12:44:41,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:44:41 BoogieIcfgContainer [2022-11-20 12:44:41,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:44:41,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:44:41,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:44:41,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:44:41,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:44:40" (1/3) ... [2022-11-20 12:44:41,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540a761e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:44:41, skipping insertion in model container [2022-11-20 12:44:41,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:44:40" (2/3) ... [2022-11-20 12:44:41,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@540a761e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:44:41, skipping insertion in model container [2022-11-20 12:44:41,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:44:41" (3/3) ... [2022-11-20 12:44:41,654 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all_reverse.i [2022-11-20 12:44:41,684 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:44:41,684 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:44:41,771 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:44:41,780 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;@7d17a441, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:44:41,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 12:44:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:44:41,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:44:41,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:41,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:41,802 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:41,812 INFO L85 PathProgramCache]: Analyzing trace with hash 18959570, now seen corresponding path program 1 times [2022-11-20 12:44:41,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:41,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639419040] [2022-11-20 12:44:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:41,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:42,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:44:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:44:42,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:42,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639419040] [2022-11-20 12:44:42,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639419040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:44:42,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:44:42,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:44:42,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964166112] [2022-11-20 12:44:42,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:44:42,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:44:42,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:42,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:44:42,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:44:42,421 INFO L87 Difference]: Start difference. First operand has 32 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:44:42,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:42,536 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-11-20 12:44:42,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:44:42,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-20 12:44:42,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:42,551 INFO L225 Difference]: With dead ends: 51 [2022-11-20 12:44:42,551 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 12:44:42,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:44:42,562 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:42,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:44:42,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 12:44:42,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-20 12:44:42,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:44:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-20 12:44:42,606 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2022-11-20 12:44:42,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:42,607 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-20 12:44:42,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:44:42,608 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-20 12:44:42,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 12:44:42,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:42,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:42,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:44:42,611 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:42,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:42,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1012316651, now seen corresponding path program 1 times [2022-11-20 12:44:42,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:42,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008087241] [2022-11-20 12:44:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:42,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:42,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:44:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:44:42,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:42,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008087241] [2022-11-20 12:44:42,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008087241] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:44:42,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:44:42,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:44:42,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28157489] [2022-11-20 12:44:42,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:44:42,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:44:42,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:42,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:44:42,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:44:42,828 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:44:42,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:42,900 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2022-11-20 12:44:42,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:44:42,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-20 12:44:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:42,904 INFO L225 Difference]: With dead ends: 47 [2022-11-20 12:44:42,905 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 12:44:42,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:44:42,927 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:42,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 71 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:44:42,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 12:44:42,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-11-20 12:44:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:44:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-20 12:44:42,946 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2022-11-20 12:44:42,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:42,948 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-20 12:44:42,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:44:42,948 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-20 12:44:42,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 12:44:42,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:42,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:42,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:44:42,950 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:42,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:42,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1534086739, now seen corresponding path program 1 times [2022-11-20 12:44:42,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:42,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976910530] [2022-11-20 12:44:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:42,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:43,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:44:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:43,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:44:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:44:43,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:43,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976910530] [2022-11-20 12:44:43,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976910530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:43,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99989779] [2022-11-20 12:44:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:43,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:43,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:43,244 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:43,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:44:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:43,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 12:44:43,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:44:43,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:44:43,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99989779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:44:43,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:44:43,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-20 12:44:43,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691154653] [2022-11-20 12:44:43,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:44:43,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:44:43,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:43,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:44:43,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:44:43,578 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 12:44:43,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:43,611 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-11-20 12:44:43,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:44:43,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-11-20 12:44:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:43,613 INFO L225 Difference]: With dead ends: 43 [2022-11-20 12:44:43,613 INFO L226 Difference]: Without dead ends: 39 [2022-11-20 12:44:43,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:44:43,615 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:43,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 63 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:44:43,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-20 12:44:43,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-11-20 12:44:43,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:44:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-11-20 12:44:43,624 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2022-11-20 12:44:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:43,625 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-11-20 12:44:43,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 12:44:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-11-20 12:44:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 12:44:43,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:43,627 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:43,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:44:43,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:43,835 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:43,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:43,835 INFO L85 PathProgramCache]: Analyzing trace with hash -336289866, now seen corresponding path program 1 times [2022-11-20 12:44:43,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:43,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300918658] [2022-11-20 12:44:43,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:43,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:44,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:44:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:44,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:44:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:44:44,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:44,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300918658] [2022-11-20 12:44:44,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300918658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:44,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933965303] [2022-11-20 12:44:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:44,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:44,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:44,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:44,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:44:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:44,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:44:44,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:44:44,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:44:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:44:44,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933965303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:44:44,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:44:44,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2022-11-20 12:44:44,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304862656] [2022-11-20 12:44:44,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:44:44,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:44:44,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:44,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:44:44,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:44:44,763 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 12:44:44,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:44,872 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-11-20 12:44:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:44:44,873 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-11-20 12:44:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:44,874 INFO L225 Difference]: With dead ends: 55 [2022-11-20 12:44:44,874 INFO L226 Difference]: Without dead ends: 51 [2022-11-20 12:44:44,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:44:44,876 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 103 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:44,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 107 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:44:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-20 12:44:44,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2022-11-20 12:44:44,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:44:44,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-11-20 12:44:44,886 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 31 [2022-11-20 12:44:44,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:44,886 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-11-20 12:44:44,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 12:44:44,887 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-11-20 12:44:44,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 12:44:44,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:44,889 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:44,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:44:45,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:45,098 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:45,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:45,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1253213581, now seen corresponding path program 2 times [2022-11-20 12:44:45,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:45,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942817852] [2022-11-20 12:44:45,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:45,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:45,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:44:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:45,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:44:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 12:44:45,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:45,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942817852] [2022-11-20 12:44:45,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942817852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:44:45,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:44:45,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:44:45,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271626005] [2022-11-20 12:44:45,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:44:45,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:44:45,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:45,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:44:45,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:44:45,579 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 12:44:45,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:45,739 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2022-11-20 12:44:45,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:44:45,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-11-20 12:44:45,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:45,744 INFO L225 Difference]: With dead ends: 57 [2022-11-20 12:44:45,745 INFO L226 Difference]: Without dead ends: 40 [2022-11-20 12:44:45,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:44:45,748 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 27 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:45,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 100 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:44:45,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-20 12:44:45,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-20 12:44:45,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:44:45,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-11-20 12:44:45,776 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 38 [2022-11-20 12:44:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:45,777 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-11-20 12:44:45,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 12:44:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-11-20 12:44:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 12:44:45,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:45,782 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:45,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:44:45,783 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:45,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:45,783 INFO L85 PathProgramCache]: Analyzing trace with hash -180232099, now seen corresponding path program 1 times [2022-11-20 12:44:45,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:45,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546539820] [2022-11-20 12:44:45,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:45,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:46,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:44:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:46,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:44:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 12:44:46,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:46,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546539820] [2022-11-20 12:44:46,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546539820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:44:46,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:44:46,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:44:46,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225706993] [2022-11-20 12:44:46,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:44:46,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:44:46,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:44:46,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:44:46,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:44:46,080 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 12:44:46,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:44:46,182 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2022-11-20 12:44:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:44:46,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2022-11-20 12:44:46,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:44:46,189 INFO L225 Difference]: With dead ends: 68 [2022-11-20 12:44:46,189 INFO L226 Difference]: Without dead ends: 44 [2022-11-20 12:44:46,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:44:46,197 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:44:46,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 82 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:44:46,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-20 12:44:46,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-20 12:44:46,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:44:46,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-11-20 12:44:46,219 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 44 [2022-11-20 12:44:46,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:44:46,220 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-11-20 12:44:46,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 12:44:46,220 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-11-20 12:44:46,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 12:44:46,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:44:46,222 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:44:46,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:44:46,223 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:44:46,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:44:46,224 INFO L85 PathProgramCache]: Analyzing trace with hash 246982931, now seen corresponding path program 1 times [2022-11-20 12:44:46,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:44:46,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340710750] [2022-11-20 12:44:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:46,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:44:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:48,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:44:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:48,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:44:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:44:48,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:44:48,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340710750] [2022-11-20 12:44:48,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340710750] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:44:48,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828783180] [2022-11-20 12:44:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:44:48,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:44:48,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:44:48,767 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:44:48,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:44:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:44:49,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-20 12:44:49,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:44:49,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:44:49,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 12:44:49,174 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_560 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_560)))) is different from true [2022-11-20 12:44:49,194 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_#res#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_560 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_560)))) is different from true [2022-11-20 12:44:49,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:44:49,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-20 12:44:49,442 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:44:49,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:44:49,974 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-20 12:44:49,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2022-11-20 12:44:49,981 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-11-20 12:44:51,135 INFO L321 Elim1Store]: treesize reduction 76, result has 76.3 percent of original size [2022-11-20 12:44:51,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 191 treesize of output 361 [2022-11-20 12:44:51,472 INFO L321 Elim1Store]: treesize reduction 60, result has 75.1 percent of original size [2022-11-20 12:44:51,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 335 treesize of output 401 [2022-11-20 12:46:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2022-11-20 12:46:53,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:46:54,156 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 12:46:54,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 183 [2022-11-20 12:46:54,284 INFO L321 Elim1Store]: treesize reduction 8, result has 87.5 percent of original size [2022-11-20 12:46:54,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 286 treesize of output 249 [2022-11-20 12:46:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 12:46:54,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828783180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:46:54,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:46:54,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 11] total 49 [2022-11-20 12:46:54,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911282159] [2022-11-20 12:46:54,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:46:54,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 12:46:54,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:54,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 12:46:54,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2023, Unknown=2, NotChecked=182, Total=2352 [2022-11-20 12:46:54,791 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 49 states, 47 states have (on average 2.276595744680851) internal successors, (107), 43 states have internal predecessors, (107), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 12:46:58,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:58,279 INFO L93 Difference]: Finished difference Result 147 states and 169 transitions. [2022-11-20 12:46:58,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 12:46:58,280 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.276595744680851) internal successors, (107), 43 states have internal predecessors, (107), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-11-20 12:46:58,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:58,283 INFO L225 Difference]: With dead ends: 147 [2022-11-20 12:46:58,283 INFO L226 Difference]: Without dead ends: 115 [2022-11-20 12:46:58,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=460, Invalid=4516, Unknown=2, NotChecked=278, Total=5256 [2022-11-20 12:46:58,286 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 396 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:58,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 503 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 548 Invalid, 0 Unknown, 213 Unchecked, 0.6s Time] [2022-11-20 12:46:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-20 12:46:58,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 52. [2022-11-20 12:46:58,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:46:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-11-20 12:46:58,300 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 48 [2022-11-20 12:46:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:58,301 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-11-20 12:46:58,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.276595744680851) internal successors, (107), 43 states have internal predecessors, (107), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 12:46:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-11-20 12:46:58,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 12:46:58,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:58,303 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:58,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:46:58,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:46:58,516 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:58,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:58,516 INFO L85 PathProgramCache]: Analyzing trace with hash 531611278, now seen corresponding path program 1 times [2022-11-20 12:46:58,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:58,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919325110] [2022-11-20 12:46:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:58,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:58,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:46:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:58,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:46:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 12:46:58,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:58,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919325110] [2022-11-20 12:46:58,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919325110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:46:58,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823341302] [2022-11-20 12:46:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:58,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:46:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:46:58,794 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:46:58,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:46:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:59,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 12:46:59,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:46:59,099 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:46:59,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 48 [2022-11-20 12:46:59,113 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:46:59,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2022-11-20 12:46:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 12:46:59,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:46:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 12:46:59,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823341302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:46:59,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:46:59,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-11-20 12:46:59,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230337763] [2022-11-20 12:46:59,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:46:59,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 12:46:59,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:59,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 12:46:59,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:46:59,201 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 12:46:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:59,344 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2022-11-20 12:46:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:46:59,345 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-11-20 12:46:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:59,346 INFO L225 Difference]: With dead ends: 92 [2022-11-20 12:46:59,346 INFO L226 Difference]: Without dead ends: 60 [2022-11-20 12:46:59,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:46:59,349 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:59,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 130 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 1 Unchecked, 0.1s Time] [2022-11-20 12:46:59,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-20 12:46:59,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-20 12:46:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:46:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2022-11-20 12:46:59,372 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 50 [2022-11-20 12:46:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:59,372 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2022-11-20 12:46:59,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 12:46:59,373 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2022-11-20 12:46:59,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 12:46:59,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:59,376 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:59,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:46:59,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 12:46:59,584 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:59,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:59,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1766412247, now seen corresponding path program 2 times [2022-11-20 12:46:59,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:59,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864557345] [2022-11-20 12:46:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:59,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:47:01,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 12:47:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:47:01,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:47:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:47:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 12:47:01,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:47:01,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864557345] [2022-11-20 12:47:01,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864557345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:47:01,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256203837] [2022-11-20 12:47:01,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:47:01,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:47:01,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:47:01,397 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:47:01,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3163996e-cbd6-43ee-868d-73975c3a71f3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:47:01,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:47:01,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:47:01,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-20 12:47:01,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:47:01,899 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:47:01,912 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 12:47:02,004 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 12:47:02,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-11-20 12:47:02,020 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-20 12:47:02,020 INFO L350 Elim1Store]: Elim1 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 27 treesize of output 22 [2022-11-20 12:47:04,494 INFO L321 Elim1Store]: treesize reduction 308, result has 54.2 percent of original size [2022-11-20 12:47:04,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 17 new quantified variables, introduced 55 case distinctions, treesize of input 339 treesize of output 549 [2022-11-20 12:47:05,262 INFO L321 Elim1Store]: treesize reduction 256, result has 56.8 percent of original size [2022-11-20 12:47:05,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 15 new quantified variables, introduced 55 case distinctions, treesize of input 527 treesize of output 639