./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8 --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 d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f --- 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-2329fc7 [2022-12-13 22:32:13,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:32:13,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:32:13,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:32:13,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:32:13,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:32:13,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:32:13,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:32:13,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:32:13,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:32:13,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:32:13,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:32:13,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:32:13,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:32:13,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:32:13,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:32:13,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:32:13,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:32:13,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:32:13,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:32:13,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:32:13,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:32:13,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:32:13,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:32:13,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:32:13,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:32:13,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:32:13,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:32:13,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:32:13,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:32:13,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:32:13,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:32:13,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:32:13,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:32:13,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:32:13,152 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:32:13,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:32:13,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:32:13,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:32:13,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:32:13,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:32:13,154 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 22:32:13,169 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:32:13,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:32:13,169 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:32:13,169 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:32:13,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:32:13,170 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:32:13,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:32:13,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:32:13,171 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:32:13,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:32:13,171 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:32:13,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:32:13,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:32:13,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:32:13,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 22:32:13,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:32:13,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 22:32:13,172 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:32:13,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 22:32:13,172 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:32:13,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 22:32:13,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:32:13,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:32:13,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:32:13,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:32:13,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:32:13,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:32:13,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 22:32:13,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:32:13,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:32:13,174 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:32:13,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 22:32:13,174 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:32:13,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:32:13,174 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:32:13,174 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d03532f6674c1e8789842ed1d67090f7bce36756d61994a67b8c2e5e0b23351f [2022-12-13 22:32:13,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:32:13,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:32:13,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:32:13,391 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:32:13,392 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:32:13,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2022-12-13 22:32:15,941 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:32:16,098 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:32:16,098 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2022-12-13 22:32:16,102 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/data/9f4df7339/8af64765ce534958bac0d1b2e6d97dff/FLAG1c8447ae7 [2022-12-13 22:32:16,496 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/data/9f4df7339/8af64765ce534958bac0d1b2e6d97dff [2022-12-13 22:32:16,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:32:16,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:32:16,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:32:16,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:32:16,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:32:16,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:32:16" (1/1) ... [2022-12-13 22:32:16,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bde0c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:32:16, skipping insertion in model container [2022-12-13 22:32:16,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:32:16" (1/1) ... [2022-12-13 22:32:16,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:32:16,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:32:16,628 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_33071138-fdf7-4518-9498-3279522c9057/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c[415,428] [2022-12-13 22:32:16,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:32:16,648 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:32:16,657 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_33071138-fdf7-4518-9498-3279522c9057/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c[415,428] [2022-12-13 22:32:16,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:32:16,671 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:32:16,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:32:16 WrapperNode [2022-12-13 22:32:16,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:32:16,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:32:16,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:32:16,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:32:16,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:32:16" (1/1) ... [2022-12-13 22:32:16,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:32:16" (1/1) ... [2022-12-13 22:32:16,699 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2022-12-13 22:32:16,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:32:16,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:32:16,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:32:16,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:32:16,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:32:16" (1/1) ... [2022-12-13 22:32:16,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:32:16" (1/1) ... [2022-12-13 22:32:16,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:32:16" (1/1) ... [2022-12-13 22:32:16,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:32:16" (1/1) ... [2022-12-13 22:32:16,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:32:16" (1/1) ... [2022-12-13 22:32:16,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:32:16" (1/1) ... [2022-12-13 22:32:16,718 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:32:16" (1/1) ... [2022-12-13 22:32:16,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:32:16" (1/1) ... [2022-12-13 22:32:16,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:32:16,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:32:16,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:32:16,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:32:16,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:32:16" (1/1) ... [2022-12-13 22:32:16,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:32:16,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:32:16,750 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:32:16,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:32:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:32:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 22:32:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 22:32:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 22:32:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:32:16,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:32:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 22:32:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 22:32:16,835 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:32:16,837 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:32:16,920 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:32:16,925 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:32:16,925 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 22:32:16,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:32:16 BoogieIcfgContainer [2022-12-13 22:32:16,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:32:16,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:32:16,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:32:16,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:32:16,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:32:16" (1/3) ... [2022-12-13 22:32:16,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c58d33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:32:16, skipping insertion in model container [2022-12-13 22:32:16,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:32:16" (2/3) ... [2022-12-13 22:32:16,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c58d33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:32:16, skipping insertion in model container [2022-12-13 22:32:16,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:32:16" (3/3) ... [2022-12-13 22:32:16,935 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind3.c [2022-12-13 22:32:16,952 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:32:16,952 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 22:32:16,995 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:32:16,999 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;@4c1d5d1a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:32:16,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 22:32:17,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 22:32:17,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:32:17,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:32:17,007 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:32:17,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:32:17,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2022-12-13 22:32:17,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:32:17,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297010713] [2022-12-13 22:32:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:32:17,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:32:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:17,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:32:17,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297010713] [2022-12-13 22:32:17,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297010713] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:32:17,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:32:17,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:32:17,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373281472] [2022-12-13 22:32:17,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:32:17,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 22:32:17,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:32:17,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 22:32:17,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 22:32:17,147 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:17,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:32:17,159 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-12-13 22:32:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 22:32:17,161 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 22:32:17,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:32:17,166 INFO L225 Difference]: With dead ends: 27 [2022-12-13 22:32:17,166 INFO L226 Difference]: Without dead ends: 12 [2022-12-13 22:32:17,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 22:32:17,171 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:32:17,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:32:17,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-13 22:32:17,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-13 22:32:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-12-13 22:32:17,199 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2022-12-13 22:32:17,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:32:17,199 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-12-13 22:32:17,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-12-13 22:32:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 22:32:17,200 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:32:17,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:32:17,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 22:32:17,201 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:32:17,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:32:17,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2022-12-13 22:32:17,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:32:17,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820124881] [2022-12-13 22:32:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:32:17,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:32:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:17,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:32:17,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820124881] [2022-12-13 22:32:17,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820124881] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:32:17,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:32:17,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:32:17,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509801674] [2022-12-13 22:32:17,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:32:17,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:32:17,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:32:17,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:32:17,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:32:17,315 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:17,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:32:17,340 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-12-13 22:32:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:32:17,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 22:32:17,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:32:17,341 INFO L225 Difference]: With dead ends: 29 [2022-12-13 22:32:17,341 INFO L226 Difference]: Without dead ends: 22 [2022-12-13 22:32:17,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:32:17,343 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:32:17,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:32:17,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-13 22:32:17,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2022-12-13 22:32:17,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-12-13 22:32:17,353 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-12-13 22:32:17,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:32:17,354 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-12-13 22:32:17,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:17,354 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-12-13 22:32:17,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 22:32:17,354 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:32:17,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:32:17,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 22:32:17,355 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:32:17,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:32:17,355 INFO L85 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2022-12-13 22:32:17,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:32:17,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419969337] [2022-12-13 22:32:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:32:17,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:32:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:17,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:32:17,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419969337] [2022-12-13 22:32:17,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419969337] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:32:17,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:32:17,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:32:17,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016692716] [2022-12-13 22:32:17,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:32:17,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:32:17,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:32:17,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:32:17,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:32:17,426 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:17,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:32:17,448 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-12-13 22:32:17,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:32:17,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 22:32:17,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:32:17,449 INFO L225 Difference]: With dead ends: 23 [2022-12-13 22:32:17,449 INFO L226 Difference]: Without dead ends: 15 [2022-12-13 22:32:17,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:32:17,451 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:32:17,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:32:17,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-13 22:32:17,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-12-13 22:32:17,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-12-13 22:32:17,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-12-13 22:32:17,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:32:17,456 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-12-13 22:32:17,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-12-13 22:32:17,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 22:32:17,456 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:32:17,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:32:17,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 22:32:17,457 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:32:17,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:32:17,458 INFO L85 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2022-12-13 22:32:17,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:32:17,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873394492] [2022-12-13 22:32:17,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:32:17,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:32:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:17,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:32:17,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873394492] [2022-12-13 22:32:17,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873394492] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:32:17,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262310274] [2022-12-13 22:32:17,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:32:17,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:32:17,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:32:17,541 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:32:17,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 22:32:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:17,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 22:32:17,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:32:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:17,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:32:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:17,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262310274] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:32:17,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:32:17,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-12-13 22:32:17,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313147877] [2022-12-13 22:32:17,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:32:17,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 22:32:17,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:32:17,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 22:32:17,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-13 22:32:17,697 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:32:17,774 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-12-13 22:32:17,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:32:17,774 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 22:32:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:32:17,775 INFO L225 Difference]: With dead ends: 45 [2022-12-13 22:32:17,775 INFO L226 Difference]: Without dead ends: 36 [2022-12-13 22:32:17,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-12-13 22:32:17,777 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:32:17,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 57 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:32:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-13 22:32:17,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2022-12-13 22:32:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:17,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-12-13 22:32:17,782 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2022-12-13 22:32:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:32:17,782 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-12-13 22:32:17,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-12-13 22:32:17,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 22:32:17,783 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:32:17,783 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:32:17,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 22:32:17,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:32:17,986 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:32:17,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:32:17,988 INFO L85 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2022-12-13 22:32:17,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:32:17,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945534070] [2022-12-13 22:32:17,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:32:17,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:32:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:18,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:32:18,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945534070] [2022-12-13 22:32:18,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945534070] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:32:18,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256759815] [2022-12-13 22:32:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:32:18,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:32:18,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:32:18,161 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:32:18,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 22:32:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:18,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 22:32:18,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:32:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:18,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:32:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:18,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256759815] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:32:18,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:32:18,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-12-13 22:32:18,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159897895] [2022-12-13 22:32:18,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:32:18,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 22:32:18,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:32:18,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 22:32:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-13 22:32:18,274 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:32:18,323 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-12-13 22:32:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 22:32:18,323 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 22:32:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:32:18,324 INFO L225 Difference]: With dead ends: 39 [2022-12-13 22:32:18,324 INFO L226 Difference]: Without dead ends: 27 [2022-12-13 22:32:18,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-12-13 22:32:18,325 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:32:18,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:32:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-13 22:32:18,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-12-13 22:32:18,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:18,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-12-13 22:32:18,330 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2022-12-13 22:32:18,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:32:18,331 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-12-13 22:32:18,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-12-13 22:32:18,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 22:32:18,331 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:32:18,332 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:32:18,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 22:32:18,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:32:18,533 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:32:18,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:32:18,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1859381769, now seen corresponding path program 2 times [2022-12-13 22:32:18,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:32:18,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753923688] [2022-12-13 22:32:18,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:32:18,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:32:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:18,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:32:18,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753923688] [2022-12-13 22:32:18,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753923688] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:32:18,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490541445] [2022-12-13 22:32:18,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:32:18,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:32:18,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:32:18,786 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:32:18,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 22:32:18,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:32:18,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:32:18,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:32:18,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:32:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:18,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:32:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:19,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490541445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:32:19,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:32:19,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-12-13 22:32:19,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818648533] [2022-12-13 22:32:19,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:32:19,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 22:32:19,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:32:19,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 22:32:19,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=263, Unknown=0, NotChecked=0, Total=462 [2022-12-13 22:32:19,047 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:19,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:32:19,187 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2022-12-13 22:32:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 22:32:19,187 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-13 22:32:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:32:19,188 INFO L225 Difference]: With dead ends: 102 [2022-12-13 22:32:19,188 INFO L226 Difference]: Without dead ends: 95 [2022-12-13 22:32:19,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=455, Unknown=0, NotChecked=0, Total=756 [2022-12-13 22:32:19,189 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 282 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:32:19,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 77 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:32:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-13 22:32:19,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 46. [2022-12-13 22:32:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:19,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-12-13 22:32:19,194 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 22 [2022-12-13 22:32:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:32:19,194 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-12-13 22:32:19,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:19,194 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-12-13 22:32:19,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 22:32:19,195 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:32:19,195 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:32:19,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 22:32:19,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 22:32:19,397 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:32:19,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:32:19,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1855888886, now seen corresponding path program 2 times [2022-12-13 22:32:19,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:32:19,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656420805] [2022-12-13 22:32:19,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:32:19,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:32:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:19,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:32:19,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656420805] [2022-12-13 22:32:19,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656420805] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:32:19,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198578636] [2022-12-13 22:32:19,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:32:19,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:32:19,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:32:19,883 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:32:19,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 22:32:19,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:32:19,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:32:19,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 22:32:19,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:32:20,190 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 13 treesize of output 9 [2022-12-13 22:32:20,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 22:32:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:20,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:32:20,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-13 22:32:20,348 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 24 treesize of output 20 [2022-12-13 22:32:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:20,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198578636] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:32:20,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:32:20,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2022-12-13 22:32:20,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439153205] [2022-12-13 22:32:20,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:32:20,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 22:32:20,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:32:20,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 22:32:20,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 22:32:20,614 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:20,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:32:20,870 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-12-13 22:32:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 22:32:20,871 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-13 22:32:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:32:20,872 INFO L225 Difference]: With dead ends: 61 [2022-12-13 22:32:20,873 INFO L226 Difference]: Without dead ends: 59 [2022-12-13 22:32:20,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 22:32:20,874 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 22:32:20,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 146 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 22:32:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-13 22:32:20,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2022-12-13 22:32:20,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-12-13 22:32:20,883 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 23 [2022-12-13 22:32:20,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:32:20,884 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-12-13 22:32:20,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:20,884 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-12-13 22:32:20,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 22:32:20,884 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:32:20,885 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:32:20,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 22:32:21,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:32:21,087 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:32:21,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:32:21,088 INFO L85 PathProgramCache]: Analyzing trace with hash -954451792, now seen corresponding path program 3 times [2022-12-13 22:32:21,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:32:21,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651249866] [2022-12-13 22:32:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:32:21,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:32:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:21,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:32:21,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651249866] [2022-12-13 22:32:21,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651249866] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:32:21,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323459903] [2022-12-13 22:32:21,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:32:21,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:32:21,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:32:21,603 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:32:21,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 22:32:21,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 22:32:21,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:32:21,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 22:32:21,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:32:21,766 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 15 treesize of output 11 [2022-12-13 22:32:21,832 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-13 22:32:21,832 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 29 treesize of output 28 [2022-12-13 22:32:21,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-12-13 22:32:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:21,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:32:22,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-12-13 22:32:22,079 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 58 treesize of output 54 [2022-12-13 22:32:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:22,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323459903] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:32:22,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:32:22,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-12-13 22:32:22,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356910247] [2022-12-13 22:32:22,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:32:22,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 22:32:22,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:32:22,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 22:32:22,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-12-13 22:32:22,328 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:22,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:32:22,547 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2022-12-13 22:32:22,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 22:32:22,548 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-13 22:32:22,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:32:22,548 INFO L225 Difference]: With dead ends: 56 [2022-12-13 22:32:22,548 INFO L226 Difference]: Without dead ends: 54 [2022-12-13 22:32:22,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 22:32:22,550 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 79 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:32:22,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 77 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:32:22,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-13 22:32:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-12-13 22:32:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-12-13 22:32:22,558 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 26 [2022-12-13 22:32:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:32:22,559 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-12-13 22:32:22,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:22,559 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-12-13 22:32:22,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 22:32:22,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:32:22,559 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:32:22,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 22:32:22,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 22:32:22,761 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:32:22,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:32:22,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1435207764, now seen corresponding path program 1 times [2022-12-13 22:32:22,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:32:22,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786938093] [2022-12-13 22:32:22,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:32:22,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:32:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:22,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:32:22,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786938093] [2022-12-13 22:32:22,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786938093] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:32:22,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664600838] [2022-12-13 22:32:22,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:32:22,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:32:22,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:32:22,949 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:32:22,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 22:32:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:22,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 22:32:23,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:32:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:23,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:32:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:23,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664600838] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:32:23,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:32:23,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2022-12-13 22:32:23,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403285364] [2022-12-13 22:32:23,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:32:23,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 22:32:23,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:32:23,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 22:32:23,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-12-13 22:32:23,102 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:23,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:32:23,146 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-12-13 22:32:23,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 22:32:23,146 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-13 22:32:23,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:32:23,146 INFO L225 Difference]: With dead ends: 60 [2022-12-13 22:32:23,146 INFO L226 Difference]: Without dead ends: 48 [2022-12-13 22:32:23,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-12-13 22:32:23,147 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:32:23,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 63 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:32:23,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-13 22:32:23,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-12-13 22:32:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-12-13 22:32:23,152 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 27 [2022-12-13 22:32:23,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:32:23,152 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-12-13 22:32:23,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:23,152 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-12-13 22:32:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 22:32:23,153 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:32:23,153 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:32:23,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 22:32:23,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 22:32:23,355 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:32:23,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:32:23,356 INFO L85 PathProgramCache]: Analyzing trace with hash 13772134, now seen corresponding path program 2 times [2022-12-13 22:32:23,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:32:23,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855656997] [2022-12-13 22:32:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:32:23,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:32:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:23,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:32:23,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855656997] [2022-12-13 22:32:23,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855656997] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:32:23,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710203578] [2022-12-13 22:32:23,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:32:23,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:32:23,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:32:23,788 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:32:23,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 22:32:23,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:32:23,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:32:23,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 22:32:23,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:32:24,060 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 15 treesize of output 11 [2022-12-13 22:32:24,140 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-12-13 22:32:24,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:32:24,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:32:24,377 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:32:24,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 17 [2022-12-13 22:32:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:24,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:32:26,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-12-13 22:32:26,542 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 80 treesize of output 74 [2022-12-13 22:32:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:27,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710203578] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:32:27,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:32:27,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 19] total 49 [2022-12-13 22:32:27,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079794249] [2022-12-13 22:32:27,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:32:27,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 22:32:27,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:32:27,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 22:32:27,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1903, Unknown=2, NotChecked=0, Total=2352 [2022-12-13 22:32:27,062 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:28,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:32:28,786 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2022-12-13 22:32:28,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 22:32:28,786 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-13 22:32:28,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:32:28,787 INFO L225 Difference]: With dead ends: 69 [2022-12-13 22:32:28,787 INFO L226 Difference]: Without dead ends: 48 [2022-12-13 22:32:28,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=609, Invalid=2929, Unknown=2, NotChecked=0, Total=3540 [2022-12-13 22:32:28,789 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 22:32:28,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 134 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 521 Invalid, 1 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 22:32:28,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-13 22:32:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-12-13 22:32:28,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-12-13 22:32:28,795 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 30 [2022-12-13 22:32:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:32:28,795 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-12-13 22:32:28,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-12-13 22:32:28,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 22:32:28,795 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:32:28,795 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:32:28,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 22:32:28,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:32:28,996 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:32:28,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:32:28,996 INFO L85 PathProgramCache]: Analyzing trace with hash -499327066, now seen corresponding path program 3 times [2022-12-13 22:32:28,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:32:28,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124055546] [2022-12-13 22:32:28,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:32:28,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:32:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:29,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:32:29,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124055546] [2022-12-13 22:32:29,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124055546] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:32:29,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711438221] [2022-12-13 22:32:29,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:32:29,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:32:29,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:32:29,403 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:32:29,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 22:32:29,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-13 22:32:29,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:32:29,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 22:32:29,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:32:29,695 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 15 treesize of output 11 [2022-12-13 22:32:29,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:32:29,773 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 31 [2022-12-13 22:32:29,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:32:29,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:32:29,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:32:29,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2022-12-13 22:32:29,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:32:29,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:32:29,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:32:29,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2022-12-13 22:32:30,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:32:30,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2022-12-13 22:32:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 3 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:30,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:32:30,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-12-13 22:32:30,742 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 266 treesize of output 258 [2022-12-13 22:32:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 4 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:32:31,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711438221] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:32:31,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:32:31,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 21] total 54 [2022-12-13 22:32:31,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131630541] [2022-12-13 22:32:31,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:32:31,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-13 22:32:31,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:32:31,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-13 22:32:31,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2495, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 22:32:31,244 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:31,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:32:31,630 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-12-13 22:32:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 22:32:31,631 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-13 22:32:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:32:31,631 INFO L225 Difference]: With dead ends: 57 [2022-12-13 22:32:31,631 INFO L226 Difference]: Without dead ends: 55 [2022-12-13 22:32:31,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=489, Invalid=3171, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 22:32:31,632 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 80 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 22:32:31,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 111 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 22:32:31,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-13 22:32:31,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-12-13 22:32:31,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:31,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-12-13 22:32:31,642 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 36 [2022-12-13 22:32:31,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:32:31,642 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-12-13 22:32:31,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:32:31,642 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-12-13 22:32:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 22:32:31,643 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:32:31,643 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 22:32:31,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 22:32:31,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:32:31,844 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:32:31,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:32:31,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1128636068, now seen corresponding path program 4 times [2022-12-13 22:32:31,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:32:31,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659100386] [2022-12-13 22:32:31,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:32:31,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:32:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:32:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:32,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:32:32,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659100386] [2022-12-13 22:32:32,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659100386] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:32:32,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832846426] [2022-12-13 22:32:32,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:32:32,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:32:32,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:32:32,389 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:32:32,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 22:32:32,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:32:32,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:32:32,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 22:32:32,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:32:32,573 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 15 treesize of output 11 [2022-12-13 22:32:32,630 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 0 case distinctions, treesize of input 34 treesize of output 33 [2022-12-13 22:32:32,689 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 0 case distinctions, treesize of input 34 treesize of output 33 [2022-12-13 22:32:32,774 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-12-13 22:32:32,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-12-13 22:32:33,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:32:33,087 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 36 treesize of output 12 [2022-12-13 22:32:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:32:33,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:32:50,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 77 [2022-12-13 22:32:50,102 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:32:50,102 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 2731 treesize of output 2691 [2022-12-13 22:33:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:33:00,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832846426] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:33:00,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:33:00,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 57 [2022-12-13 22:33:00,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845922014] [2022-12-13 22:33:00,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:33:00,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 22:33:00,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:33:00,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 22:33:00,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=2779, Unknown=8, NotChecked=0, Total=3192 [2022-12-13 22:33:00,368 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:33:23,678 WARN L233 SmtUtils]: Spent 22.71s on a formula simplification. DAG size of input: 92 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:33:25,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:33:34,532 WARN L233 SmtUtils]: Spent 8.76s on a formula simplification. DAG size of input: 76 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:33:51,457 WARN L233 SmtUtils]: Spent 16.26s on a formula simplification. DAG size of input: 99 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:34:14,389 WARN L233 SmtUtils]: Spent 19.37s on a formula simplification. DAG size of input: 107 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:34:16,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:34:30,312 WARN L233 SmtUtils]: Spent 10.37s on a formula simplification. DAG size of input: 107 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:34:32,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:34:44,800 WARN L233 SmtUtils]: Spent 10.15s on a formula simplification. DAG size of input: 102 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:34:53,178 WARN L233 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 100 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:35:06,469 WARN L233 SmtUtils]: Spent 11.05s on a formula simplification. DAG size of input: 103 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:35:08,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:35:17,582 WARN L233 SmtUtils]: Spent 8.55s on a formula simplification. DAG size of input: 104 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:35:30,049 WARN L233 SmtUtils]: Spent 10.18s on a formula simplification. DAG size of input: 103 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:35:32,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:35:50,753 WARN L233 SmtUtils]: Spent 16.34s on a formula simplification. DAG size of input: 111 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:36:15,669 WARN L233 SmtUtils]: Spent 20.03s on a formula simplification. DAG size of input: 109 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:36:44,284 WARN L233 SmtUtils]: Spent 20.93s on a formula simplification. DAG size of input: 112 DAG size of output: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:36:46,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:37:09,201 WARN L233 SmtUtils]: Spent 20.27s on a formula simplification. DAG size of input: 110 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:37:10,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:37:31,054 WARN L233 SmtUtils]: Spent 18.37s on a formula simplification. DAG size of input: 109 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:37:33,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:37:57,928 WARN L233 SmtUtils]: Spent 20.20s on a formula simplification. DAG size of input: 102 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:38:19,804 WARN L233 SmtUtils]: Spent 19.27s on a formula simplification. DAG size of input: 94 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:38:46,146 WARN L233 SmtUtils]: Spent 21.44s on a formula simplification. DAG size of input: 104 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:39:11,108 WARN L233 SmtUtils]: Spent 20.78s on a formula simplification. DAG size of input: 95 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:39:11,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:39:11,110 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2022-12-13 22:39:11,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-12-13 22:39:11,110 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-13 22:39:11,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:39:11,111 INFO L225 Difference]: With dead ends: 150 [2022-12-13 22:39:11,111 INFO L226 Difference]: Without dead ends: 148 [2022-12-13 22:39:11,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3250 ImplicationChecksByTransitivity, 371.5s TimeCoverageRelationStatistics Valid=1476, Invalid=11156, Unknown=24, NotChecked=0, Total=12656 [2022-12-13 22:39:11,113 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 432 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 35 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2022-12-13 22:39:11,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 380 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1058 Invalid, 6 Unknown, 0 Unchecked, 16.8s Time] [2022-12-13 22:39:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-12-13 22:39:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 73. [2022-12-13 22:39:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2022-12-13 22:39:11,125 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 40 [2022-12-13 22:39:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:39:11,125 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2022-12-13 22:39:11,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2022-12-13 22:39:11,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 22:39:11,126 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:39:11,126 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 22:39:11,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 22:39:11,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:39:11,327 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:39:11,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:39:11,329 INFO L85 PathProgramCache]: Analyzing trace with hash 882120722, now seen corresponding path program 5 times [2022-12-13 22:39:11,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:39:11,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889189651] [2022-12-13 22:39:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:39:11,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:39:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:39:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 12 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:39:11,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:39:11,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889189651] [2022-12-13 22:39:11,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889189651] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:39:11,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505046214] [2022-12-13 22:39:11,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:39:11,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:39:11,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:39:11,963 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:39:11,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 22:39:12,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-12-13 22:39:12,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:39:12,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 22:39:12,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:39:12,553 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 13 treesize of output 9 [2022-12-13 22:39:12,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 22:39:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:39:12,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:39:13,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-13 22:39:13,022 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 24 treesize of output 20 [2022-12-13 22:39:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:39:13,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505046214] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:39:13,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:39:13,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 64 [2022-12-13 22:39:13,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608921360] [2022-12-13 22:39:13,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:39:13,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-13 22:39:13,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:39:13,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-13 22:39:13,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=3779, Unknown=0, NotChecked=0, Total=4032 [2022-12-13 22:39:13,577 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 64 states, 64 states have (on average 1.984375) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:14,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:39:14,839 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2022-12-13 22:39:14,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 22:39:14,840 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-12-13 22:39:14,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:39:14,840 INFO L225 Difference]: With dead ends: 88 [2022-12-13 22:39:14,840 INFO L226 Difference]: Without dead ends: 59 [2022-12-13 22:39:14,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=427, Invalid=5735, Unknown=0, NotChecked=0, Total=6162 [2022-12-13 22:39:14,841 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 22:39:14,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 358 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1396 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 22:39:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-13 22:39:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-12-13 22:39:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.105263157894737) internal successors, (63), 57 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2022-12-13 22:39:14,849 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 44 [2022-12-13 22:39:14,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:39:14,850 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2022-12-13 22:39:14,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2022-12-13 22:39:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 22:39:14,850 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:39:14,850 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 22:39:14,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 22:39:15,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:39:15,052 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:39:15,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:39:15,053 INFO L85 PathProgramCache]: Analyzing trace with hash 732190104, now seen corresponding path program 6 times [2022-12-13 22:39:15,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:39:15,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997205264] [2022-12-13 22:39:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:39:15,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:39:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:39:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:39:15,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:39:15,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997205264] [2022-12-13 22:39:15,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997205264] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:39:15,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684929957] [2022-12-13 22:39:15,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 22:39:15,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:39:15,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:39:15,662 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:39:15,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 22:39:15,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-12-13 22:39:15,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:39:15,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 22:39:15,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:39:15,915 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 15 treesize of output 11 [2022-12-13 22:39:15,986 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-13 22:39:15,986 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 29 treesize of output 28 [2022-12-13 22:39:16,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-12-13 22:39:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:39:16,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:39:17,059 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_135| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_135|)) (forall ((v_ArrVal_333 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_135| 4)) v_ArrVal_333) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28)) 1)))) is different from false [2022-12-13 22:39:17,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-12-13 22:39:17,068 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 130 treesize of output 122 [2022-12-13 22:39:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-12-13 22:39:17,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684929957] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:39:17,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:39:17,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 54 [2022-12-13 22:39:17,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084952412] [2022-12-13 22:39:17,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:39:17,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-13 22:39:17,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:39:17,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-13 22:39:17,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2573, Unknown=1, NotChecked=102, Total=2862 [2022-12-13 22:39:17,655 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:21,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:39:21,151 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2022-12-13 22:39:21,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 22:39:21,152 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-12-13 22:39:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:39:21,152 INFO L225 Difference]: With dead ends: 79 [2022-12-13 22:39:21,152 INFO L226 Difference]: Without dead ends: 77 [2022-12-13 22:39:21,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=325, Invalid=3838, Unknown=1, NotChecked=126, Total=4290 [2022-12-13 22:39:21,153 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-13 22:39:21,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 259 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1055 Invalid, 3 Unknown, 53 Unchecked, 2.4s Time] [2022-12-13 22:39:21,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-13 22:39:21,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2022-12-13 22:39:21,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2022-12-13 22:39:21,170 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 47 [2022-12-13 22:39:21,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:39:21,170 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2022-12-13 22:39:21,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:21,170 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2022-12-13 22:39:21,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 22:39:21,171 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:39:21,171 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 22:39:21,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 22:39:21,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 22:39:21,373 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:39:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:39:21,374 INFO L85 PathProgramCache]: Analyzing trace with hash 2024902222, now seen corresponding path program 7 times [2022-12-13 22:39:21,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:39:21,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755891149] [2022-12-13 22:39:21,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:39:21,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:39:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:39:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 24 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:39:22,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:39:22,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755891149] [2022-12-13 22:39:22,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755891149] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:39:22,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35404289] [2022-12-13 22:39:22,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 22:39:22,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:39:22,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:39:22,076 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:39:22,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 22:39:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:39:22,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 22:39:22,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:39:22,653 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 13 treesize of output 9 [2022-12-13 22:39:22,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 22:39:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:39:22,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:39:23,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-13 22:39:23,218 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 24 treesize of output 20 [2022-12-13 22:39:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:39:23,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35404289] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:39:23,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:39:23,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 71 [2022-12-13 22:39:23,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297571207] [2022-12-13 22:39:23,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:39:23,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-13 22:39:23,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:39:23,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-13 22:39:23,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=4689, Unknown=0, NotChecked=0, Total=4970 [2022-12-13 22:39:23,887 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 71 states, 71 states have (on average 2.084507042253521) internal successors, (148), 71 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:25,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:39:25,464 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2022-12-13 22:39:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 22:39:25,465 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.084507042253521) internal successors, (148), 71 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-12-13 22:39:25,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:39:25,465 INFO L225 Difference]: With dead ends: 99 [2022-12-13 22:39:25,465 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 22:39:25,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=454, Invalid=6856, Unknown=0, NotChecked=0, Total=7310 [2022-12-13 22:39:25,467 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 22:39:25,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 617 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 22:39:25,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 22:39:25,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-12-13 22:39:25,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 71 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2022-12-13 22:39:25,480 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 51 [2022-12-13 22:39:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:39:25,481 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2022-12-13 22:39:25,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.084507042253521) internal successors, (148), 71 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:25,481 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2022-12-13 22:39:25,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 22:39:25,481 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:39:25,481 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 22:39:25,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 22:39:25,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 22:39:25,683 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:39:25,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:39:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2133313349, now seen corresponding path program 1 times [2022-12-13 22:39:25,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:39:25,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653498745] [2022-12-13 22:39:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:39:25,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:39:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:39:25,912 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 22:39:25,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:39:25,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653498745] [2022-12-13 22:39:25,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653498745] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:39:25,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124824901] [2022-12-13 22:39:25,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:39:25,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:39:25,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:39:25,914 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:39:25,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 22:39:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:39:25,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 22:39:25,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:39:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 22:39:26,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:39:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 22:39:26,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124824901] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:39:26,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:39:26,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-12-13 22:39:26,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282574079] [2022-12-13 22:39:26,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:39:26,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 22:39:26,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:39:26,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 22:39:26,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=1019, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 22:39:26,377 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 43 states, 43 states have (on average 2.86046511627907) internal successors, (123), 42 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:39:26,924 INFO L93 Difference]: Finished difference Result 459 states and 506 transitions. [2022-12-13 22:39:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 22:39:26,925 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.86046511627907) internal successors, (123), 42 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-12-13 22:39:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:39:26,926 INFO L225 Difference]: With dead ends: 459 [2022-12-13 22:39:26,926 INFO L226 Difference]: Without dead ends: 438 [2022-12-13 22:39:26,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1190, Invalid=1890, Unknown=0, NotChecked=0, Total=3080 [2022-12-13 22:39:26,927 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 571 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:39:26,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 173 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:39:26,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-12-13 22:39:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 113. [2022-12-13 22:39:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 112 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2022-12-13 22:39:26,944 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 51 [2022-12-13 22:39:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:39:26,945 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2022-12-13 22:39:26,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.86046511627907) internal successors, (123), 42 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:26,945 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2022-12-13 22:39:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 22:39:26,945 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:39:26,945 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 22:39:26,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 22:39:27,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 22:39:27,147 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:39:27,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:39:27,149 INFO L85 PathProgramCache]: Analyzing trace with hash 668960220, now seen corresponding path program 8 times [2022-12-13 22:39:27,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:39:27,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079497238] [2022-12-13 22:39:27,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:39:27,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:39:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:39:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 18 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:39:27,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:39:27,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079497238] [2022-12-13 22:39:27,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079497238] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:39:27,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138105258] [2022-12-13 22:39:27,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:39:27,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:39:27,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:39:27,856 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:39:27,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 22:39:27,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:39:27,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:39:27,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 22:39:27,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:39:28,267 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 15 treesize of output 11 [2022-12-13 22:39:28,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:39:28,336 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 22:39:28,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:39:28,379 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 22:39:28,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:39:28,425 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 22:39:28,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:39:28,472 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 22:39:28,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:39:28,520 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 22:39:28,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 22:39:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 26 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:39:28,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:39:34,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-12-13 22:39:34,570 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 130 treesize of output 122 [2022-12-13 22:39:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 22:39:35,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138105258] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:39:35,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:39:35,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 22] total 67 [2022-12-13 22:39:35,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515185914] [2022-12-13 22:39:35,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:39:35,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-13 22:39:35,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:39:35,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-13 22:39:35,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=4088, Unknown=1, NotChecked=0, Total=4422 [2022-12-13 22:39:35,126 INFO L87 Difference]: Start difference. First operand 113 states and 131 transitions. Second operand has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 67 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:39:36,303 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2022-12-13 22:39:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 22:39:36,303 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 67 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-12-13 22:39:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:39:36,304 INFO L225 Difference]: With dead ends: 136 [2022-12-13 22:39:36,305 INFO L226 Difference]: Without dead ends: 134 [2022-12-13 22:39:36,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 57 SyntacticMatches, 10 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2354 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=716, Invalid=6423, Unknown=1, NotChecked=0, Total=7140 [2022-12-13 22:39:36,306 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 146 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 22:39:36,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 452 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 22:39:36,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-12-13 22:39:36,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 102. [2022-12-13 22:39:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 101 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2022-12-13 22:39:36,321 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 52 [2022-12-13 22:39:36,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:39:36,322 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2022-12-13 22:39:36,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1194029850746268) internal successors, (142), 67 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:36,322 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2022-12-13 22:39:36,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 22:39:36,322 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:39:36,322 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 22:39:36,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 22:39:36,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:39:36,523 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:39:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:39:36,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1999646216, now seen corresponding path program 9 times [2022-12-13 22:39:36,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:39:36,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748845384] [2022-12-13 22:39:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:39:36,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:39:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:39:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:39:37,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:39:37,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748845384] [2022-12-13 22:39:37,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748845384] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:39:37,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684934493] [2022-12-13 22:39:37,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:39:37,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:39:37,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:39:37,180 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:39:37,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 22:39:37,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-13 22:39:37,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:39:37,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 22:39:37,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:39:37,483 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 15 treesize of output 11 [2022-12-13 22:39:37,551 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-13 22:39:37,551 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 29 treesize of output 28 [2022-12-13 22:39:37,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-12-13 22:39:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:39:37,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:39:39,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-12-13 22:39:39,159 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 130 treesize of output 122 [2022-12-13 22:39:39,827 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:39:39,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684934493] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:39:39,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:39:39,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 61 [2022-12-13 22:39:39,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248017247] [2022-12-13 22:39:39,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:39:39,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 22:39:39,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:39:39,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 22:39:39,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=3446, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 22:39:39,828 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 61 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:41,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:39:41,027 INFO L93 Difference]: Finished difference Result 111 states and 128 transitions. [2022-12-13 22:39:41,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 22:39:41,028 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 61 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-12-13 22:39:41,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:39:41,028 INFO L225 Difference]: With dead ends: 111 [2022-12-13 22:39:41,028 INFO L226 Difference]: Without dead ends: 109 [2022-12-13 22:39:41,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=390, Invalid=5160, Unknown=0, NotChecked=0, Total=5550 [2022-12-13 22:39:41,029 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 22:39:41,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 311 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 22:39:41,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-12-13 22:39:41,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2022-12-13 22:39:41,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1714285714285715) internal successors, (123), 105 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:41,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2022-12-13 22:39:41,045 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 54 [2022-12-13 22:39:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:39:41,045 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2022-12-13 22:39:41,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1475409836065573) internal successors, (131), 61 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:41,046 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2022-12-13 22:39:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 22:39:41,046 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:39:41,046 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 22:39:41,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 22:39:41,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 22:39:41,248 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:39:41,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:39:41,249 INFO L85 PathProgramCache]: Analyzing trace with hash -256135490, now seen corresponding path program 10 times [2022-12-13 22:39:41,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:39:41,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139606222] [2022-12-13 22:39:41,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:39:41,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:39:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:39:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 40 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:39:41,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:39:41,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139606222] [2022-12-13 22:39:41,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139606222] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:39:41,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960681349] [2022-12-13 22:39:41,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:39:41,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:39:41,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:39:41,946 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:39:41,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 22:39:42,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:39:42,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:39:42,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 22:39:42,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:39:42,332 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 15 treesize of output 11 [2022-12-13 22:39:42,421 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 0 case distinctions, treesize of input 32 treesize of output 31 [2022-12-13 22:39:50,039 INFO L321 Elim1Store]: treesize reduction 46, result has 13.2 percent of original size [2022-12-13 22:39:50,039 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 20 [2022-12-13 22:39:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 45 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:39:50,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:39:51,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-12-13 22:39:51,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:39:51,066 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 259 treesize of output 239 [2022-12-13 22:39:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:39:51,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960681349] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:39:51,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:39:51,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 63 [2022-12-13 22:39:51,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769389714] [2022-12-13 22:39:51,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:39:51,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 22:39:51,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:39:51,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 22:39:51,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=3368, Unknown=4, NotChecked=0, Total=3906 [2022-12-13 22:39:51,368 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 63 states, 63 states have (on average 2.2698412698412698) internal successors, (143), 63 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:39:52,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:40:07,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:40:16,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:40:19,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 22:40:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:40:19,446 INFO L93 Difference]: Finished difference Result 134 states and 152 transitions. [2022-12-13 22:40:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 22:40:19,447 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.2698412698412698) internal successors, (143), 63 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-12-13 22:40:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:40:19,447 INFO L225 Difference]: With dead ends: 134 [2022-12-13 22:40:19,447 INFO L226 Difference]: Without dead ends: 0 [2022-12-13 22:40:19,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 73 SyntacticMatches, 10 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2908 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=1475, Invalid=10508, Unknown=7, NotChecked=0, Total=11990 [2022-12-13 22:40:19,448 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 14 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-12-13 22:40:19,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 221 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1185 Invalid, 5 Unknown, 0 Unchecked, 10.6s Time] [2022-12-13 22:40:19,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-13 22:40:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-13 22:40:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:40:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-13 22:40:19,449 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2022-12-13 22:40:19,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:40:19,449 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-13 22:40:19,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.2698412698412698) internal successors, (143), 63 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:40:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-13 22:40:19,450 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-13 22:40:19,451 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-13 22:40:19,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-13 22:40:19,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33071138-fdf7-4518-9498-3279522c9057/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:40:19,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-13 22:46:01,537 WARN L233 SmtUtils]: Spent 5.70m on a formula simplification. DAG size of input: 558 DAG size of output: 536 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)